12907776 has 108 divisors (see below), whose sum is σ = 40078752. Its totient is φ = 3687936.

The previous prime is 12907771. The next prime is 12907781. The reversal of 12907776 is 67770921.

It is an interprime number because it is at equal distance from previous prime (12907771) and next prime (12907781).

It is a super-2 number, since 2×12907776² = 333221362532352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12907771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1843965 + ... + 1843971.

Almost surely, 2^12907776 is an apocalyptic number.

12907776 is a gapful number since it is divisible by the number (16) 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 12907776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20039376).

12907776 is an abundant number, since it is smaller than the sum of its proper divisors (27170976).

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

12907776 is an frugal number, since it uses more digits than its factorization.

12907776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 12 counting only the distinct ones).

The product of its (nonzero) digits is 37044, while the sum is 39.

The square root of 12907776 is about 3592.7393448454. The cubic root of 12907776 is about 234.5761243907.

Multiplying 12907776 by its product of nonzero digits (37044), we get a square (478155654144 = 691488²).

The spelling of 12907776 in words is "twelve million, nine hundred seven thousand, seven hundred seventy-six".