320788725 has 48 divisors (see below), whose sum is σ = 564071040. Its totient is φ = 160307200.

The previous prime is 320788711. The next prime is 320788733. The reversal of 320788725 is 527887023.

It is not a de Polignac number, because 320788725 - 2⁴ = 320788709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396121 + ... + 396929.

It is an arithmetic number, because the mean of its divisors is an integer number (11751480).

Almost surely, 2^320788725 is an apocalyptic number.

It is an amenable number.

320788725 is a deficient number, since it is larger than the sum of its proper divisors (243282315).

320788725 is a wasteful number, since it uses less digits than its factorization.

320788725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 320788725 is about 17910.5757863894. The cubic root of 320788725 is about 684.5518762608.

The spelling of 320788725 in words is "three hundred twenty million, seven hundred eighty-eight thousand, seven hundred twenty-five".