128931710 has 16 divisors (see below), whose sum is σ = 233421696. Its totient is φ = 51273888.

The previous prime is 128931623. The next prime is 128931769. The reversal of 128931710 is 17139821.

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, 35534 + ... + 38993.

It is an arithmetic number, because the mean of its divisors is an integer number (14588856).

Almost surely, 2^128931710 is an apocalyptic number.

128931710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128931710 is a deficient number, since it is larger than the sum of its proper divisors (104489986).

128931710 is a wasteful number, since it uses less digits than its factorization.

128931710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74707.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 128931710 is about 11354.8099940069. The cubic root of 128931710 is about 505.1882577528.

The spelling of 128931710 in words is "one hundred twenty-eight million, nine hundred thirty-one thousand, seven hundred ten".