12656280 has 256 divisors, whose sum is σ = 49996800. Its totient is φ = 2488320.

The previous prime is 12656251. The next prime is 12656291. The reversal of 12656280 is 8265621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 207450 + ... + 207510.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

Almost surely, 2^12656280 is an apocalyptic number.

12656280 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 12656280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24998400).

12656280 is an abundant number, since it is smaller than the sum of its proper divisors (37340520).

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

12656280 is a wasteful number, since it uses less digits than its factorization.

12656280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 12656280 is about 3557.5665840571. The cubic root of 12656280 is about 233.0426220787.

The spelling of 12656280 in words is "twelve million, six hundred fifty-six thousand, two hundred eighty".