128738874 has 32 divisors (see below), whose sum is σ = 284451840. Its totient is φ = 38516400.

The previous prime is 128738849. The next prime is 128738879. The reversal of 128738874 is 478837821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128738879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7132 + ... + 17559.

It is an arithmetic number, because the mean of its divisors is an integer number (8889120).

Almost surely, 2^128738874 is an apocalyptic number.

128738874 is an abundant number, since it is smaller than the sum of its proper divisors (155712966).

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

128738874 is a wasteful number, since it uses less digits than its factorization.

128738874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24786.

The product of its digits is 602112, while the sum is 48.

The square root of 128738874 is about 11346.3154371805. The cubic root of 128738874 is about 504.9362714078.

The spelling of 128738874 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, eight hundred seventy-four".