12880456 has 8 divisors (see below), whose sum is σ = 24150870. Its totient is φ = 6440224.

The previous prime is 12880447. The next prime is 12880457. The reversal of 12880456 is 65408821.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 2056356 = 3290^2 + 1434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12880456² = 331812293535872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12880457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805021 + ... + 805036.

Almost surely, 2^12880456 is an apocalyptic number.

It is an amenable number.

12880456 is a deficient number, since it is larger than the sum of its proper divisors (11270414).

12880456 is a wasteful number, since it uses less digits than its factorization.

12880456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610063 (or 1610059 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 12880456 is about 3588.9352181392. The cubic root of 12880456 is about 234.4105098434.

The spelling of 12880456 in words is "twelve million, eight hundred eighty thousand, four hundred fifty-six".