620635264 has 32 divisors (see below), whose sum is σ = 1279064700. Its totient is φ = 299615232.

The previous prime is 620635241. The next prime is 620635291. The reversal of 620635264 is 462536026.

It can be written as a sum of positive squares in 2 ways, for example, as 615436864 + 5198400 = 24808^2 + 2280^2 .

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, 79887 + ... + 87310.

Almost surely, 2^620635264 is an apocalyptic number.

620635264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

620635264 is an abundant number, since it is smaller than the sum of its proper divisors (658429436).

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

620635264 is a wasteful number, since it uses less digits than its factorization.

620635264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167240 (or 167228 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 620635264 is about 24912.5523381287. The cubic root of 620635264 is about 852.9930305405.

The spelling of 620635264 in words is "six hundred twenty million, six hundred thirty-five thousand, two hundred sixty-four".