320436625 has 8 divisors (see below), whose sum is σ = 399905064. Its totient is φ = 256349200.

The previous prime is 320436619. The next prime is 320436637. The reversal of 320436625 is 526634023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5870929 + 314565696 = 2423^2 + 17736^2 .

It is not a de Polignac number, because 320436625 - 2¹⁵ = 320403857 is a prime.

It is a Duffinian 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, 1281622 + ... + 1281871.

It is an arithmetic number, because the mean of its divisors is an integer number (49988133).

Almost surely, 2^320436625 is an apocalyptic number.

It is an amenable number.

320436625 is a deficient number, since it is larger than the sum of its proper divisors (79468439).

320436625 is an equidigital number, since it uses as much as digits as its factorization.

320436625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563508 (or 2563498 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 320436625 is about 17900.7436996344. The cubic root of 320436625 is about 684.3013282247.

The spelling of 320436625 in words is "three hundred twenty million, four hundred thirty-six thousand, six hundred twenty-five".