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12970280 = 235714567
BaseRepresentation
bin110001011110…
…100100101000
3220101221212202
4301132210220
511310022110
61141555332
7215150141
oct61364450
926357782
1012970280
117359844
124415b48
1328c182b
141a18ac8
1512130a5
hexc5e928

12970280 has 32 divisors (see below), whose sum is σ = 29600640. Its totient is φ = 5113920.

The previous prime is 12970277. The next prime is 12970289. The reversal of 12970280 is 8207921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12970289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557 + ... + 5123.

It is an arithmetic number, because the mean of its divisors is an integer number (925020).

Almost surely, 212970280 is an apocalyptic number.

12970280 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 12970280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14800320).

12970280 is an abundant number, since it is smaller than the sum of its proper divisors (16630360).

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

12970280 is a wasteful number, since it uses less digits than its factorization.

12970280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649 (or 4645 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 12970280 is about 3601.4274947582. The cubic root of 12970280 is about 234.9541482898.

The spelling of 12970280 in words is "twelve million, nine hundred seventy thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 71 142 284 355 568 710 1420 2840 4567 9134 18268 22835 36536 45670 91340 182680 324257 648514 1297028 1621285 2594056 3242570 6485140 12970280