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1230013660 = 225314314603
BaseRepresentation
bin100100101010000…
…1000010011011100
310011201111011112111
41021110020103130
510004340414120
6322015243404
742323641441
oct11124102334
93151434474
101230013660
11581346517
122a3b19564
13167aa2745
14b95039c8
1572eb875a
hex495084dc

1230013660 has 48 divisors (see below), whose sum is σ = 2673119232. Its totient is φ = 474926400.

The previous prime is 1230013657. The next prime is 1230013663. The reversal of 1230013660 is 663100321.

It is an interprime number because it is at equal distance from previous prime (1230013657) and next prime (1230013663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230013663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264919 + ... + 269521.

It is an arithmetic number, because the mean of its divisors is an integer number (55689984).

Almost surely, 21230013660 is an apocalyptic number.

1230013660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230013660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336559616).

1230013660 is an abundant number, since it is smaller than the sum of its proper divisors (1443105572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1230013660 is a wasteful number, since it uses less digits than its factorization.

1230013660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074 (or 5072 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1230013660 is about 35071.5505787811. The cubic root of 1230013660 is about 1071.4452360413.

Adding to 1230013660 its reverse (663100321), we get a palindrome (1893113981).

The spelling of 1230013660 in words is "one billion, two hundred thirty million, thirteen thousand, six hundred sixty".

Divisors: 1 2 4 5 10 20 31 62 124 155 310 431 620 862 1724 2155 4310 4603 8620 9206 13361 18412 23015 26722 46030 53444 66805 92060 133610 142693 267220 285386 570772 713465 1426930 1983893 2853860 3967786 7935572 9919465 19838930 39677860 61500683 123001366 246002732 307503415 615006830 1230013660