620637172 has 12 divisors (see below), whose sum is σ = 1112605956. Its totient is φ = 302749760.

The previous prime is 620637169. The next prime is 620637179. The reversal of 620637172 is 271736026.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134699236 + 485937936 = 11606^2 + 22044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620637179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1892023 + ... + 1892350.

It is an arithmetic number, because the mean of its divisors is an integer number (92717163).

Almost surely, 2^620637172 is an apocalyptic number.

It is an amenable number.

620637172 is a deficient number, since it is larger than the sum of its proper divisors (491968784).

620637172 is a wasteful number, since it uses less digits than its factorization.

620637172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784418 (or 3784416 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 620637172 is about 24912.5906320479. The cubic root of 620637172 is about 852.9939046498.

The spelling of 620637172 in words is "six hundred twenty million, six hundred thirty-seven thousand, one hundred seventy-two".