320962640 has 20 divisors (see below), whose sum is σ = 746238324. Its totient is φ = 128385024.

The previous prime is 320962639. The next prime is 320962661. The reversal of 320962640 is 46269023.

It can be written as a sum of positive squares in 2 ways, for example, as 175615504 + 145347136 = 13252^2 + 12056^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 320962597 and 320962606.

It is a congruent number.

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, 2005937 + ... + 2006096.

Almost surely, 2^320962640 is an apocalyptic number.

It is an amenable number.

320962640 is an abundant number, since it is smaller than the sum of its proper divisors (425275684).

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

320962640 is a wasteful number, since it uses less digits than its factorization.

320962640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012046 (or 4012040 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 320962640 is about 17915.4302209018. The cubic root of 320962640 is about 684.6755634125.

The spelling of 320962640 in words is "three hundred twenty million, nine hundred sixty-two thousand, six hundred forty".