12920880 has 80 divisors (see below), whose sum is σ = 45782784. Its totient is φ = 2952960.

The previous prime is 12920861. The next prime is 12920903. The reversal of 12920880 is 8802921.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2166 + ... + 5525.

Almost surely, 2^12920880 is an apocalyptic number.

12920880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12920880 is an abundant number, since it is smaller than the sum of its proper divisors (32861904).

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

12920880 is a wasteful number, since it uses less digits than its factorization.

12920880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714 (or 7708 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 12920880 is about 3594.5625603125. The cubic root of 12920880 is about 234.6554782602.

The spelling of 12920880 in words is "twelve million, nine hundred twenty thousand, eight hundred eighty".