128925312 has 32 divisors (see below), whose sum is σ = 342458880. Its totient is φ = 42974976.

The previous prime is 128925299. The next prime is 128925337. The reversal of 128925312 is 213529821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167488 + ... + 168255.

It is an arithmetic number, because the mean of its divisors is an integer number (10701840).

Almost surely, 2^128925312 is an apocalyptic number.

128925312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128925312 is an abundant number, since it is smaller than the sum of its proper divisors (213533568).

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

128925312 is an equidigital number, since it uses as much as digits as its factorization.

128925312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335760 (or 335748 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 128925312 is about 11354.5282596856. The cubic root of 128925312 is about 505.1799012672.

The spelling of 128925312 in words is "one hundred twenty-eight million, nine hundred twenty-five thousand, three hundred twelve".