12890456 has 8 divisors (see below), whose sum is σ = 24169620. Its totient is φ = 6445224.

The previous prime is 12890447. The next prime is 12890461. The reversal of 12890456 is 65409821.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805646 + ... + 805661.

Almost surely, 2^12890456 is an apocalyptic number.

It is an amenable number.

12890456 is a deficient number, since it is larger than the sum of its proper divisors (11279164).

12890456 is a wasteful number, since it uses less digits than its factorization.

12890456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611313 (or 1611309 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12890456 is about 3590.3281187100. The cubic root of 12890456 is about 234.4711572493.

The spelling of 12890456 in words is "twelve million, eight hundred ninety thousand, four hundred fifty-six".