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1230122400 = 253521389443
BaseRepresentation
bin100100101010010…
…0010110110100000
310011201200200200220
41021110202312200
510004402404100
6322021443040
742324603453
oct11124426640
93151620626
101230122400
11581410191
122a3b70480
13167b100a0
14b953149a
1572edaaa0
hex49522da0

1230122400 has 288 divisors, whose sum is σ = 4370345280. Its totient is φ = 298721280.

The previous prime is 1230122393. The next prime is 1230122419. The reversal of 1230122400 is 42210321.

It is a super-2 number, since 2×12301224002 = 3026402237963520000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1230122400.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2776579 + ... + 2777021.

It is an arithmetic number, because the mean of its divisors is an integer number (15174810).

Almost surely, 21230122400 is an apocalyptic number.

1230122400 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 1230122400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2185172640).

1230122400 is an abundant number, since it is smaller than the sum of its proper divisors (3140222880).

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

1230122400 is a wasteful number, since it uses less digits than its factorization.

1230122400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1230122400 is about 35073.1008038924. The cubic root of 1230122400 is about 1071.4768090028.

Adding to 1230122400 its reverse (42210321), we get a palindrome (1272332721).

The spelling of 1230122400 in words is "one billion, two hundred thirty million, one hundred twenty-two thousand, four hundred".