128976920 has 32 divisors (see below), whose sum is σ = 300207600. Its totient is φ = 49811328.

The previous prime is 128976919. The next prime is 128976941. The reversal of 128976920 is 29679821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54434 + ... + 56753.

Almost surely, 2^128976920 is an apocalyptic number.

128976920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128976920 is an abundant number, since it is smaller than the sum of its proper divisors (171230680).

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

128976920 is a wasteful number, since it uses less digits than its factorization.

128976920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111227 (or 111223 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 128976920 is about 11356.8006058044. The cubic root of 128976920 is about 505.2472990652.

The spelling of 128976920 in words is "one hundred twenty-eight million, nine hundred seventy-six thousand, nine hundred twenty".