620644672 has 14 divisors (see below), whose sum is σ = 1231591898. Its totient is φ = 310322304.

The previous prime is 620644669. The next prime is 620644691. The reversal of 620644672 is 276446026.

It can be written as a sum of positive squares in only one way, i.e., 554319936 + 66324736 = 23544^2 + 8144^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4848723 + ... + 4848850.

Almost surely, 2^620644672 is an apocalyptic number.

It is an amenable number.

620644672 is a deficient number, since it is larger than the sum of its proper divisors (610947226).

620644672 is an equidigital number, since it uses as much as digits as its factorization.

620644672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697585 (or 9697575 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 620644672 is about 24912.7411578895. The cubic root of 620644672 is about 852.9973405963.

The spelling of 620644672 in words is "six hundred twenty million, six hundred forty-four thousand, six hundred seventy-two".