624644013 has 48 divisors (see below), whose sum is σ = 994218624. Its totient is φ = 347719680.

The previous prime is 624643993. The next prime is 624644029. The reversal of 624644013 is 310446426.

It is not a de Polignac number, because 624644013 - 2¹⁶ = 624578477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624640013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1012081 + ... + 1012697.

It is an arithmetic number, because the mean of its divisors is an integer number (20712888).

Almost surely, 2^624644013 is an apocalyptic number.

It is an amenable number.

624644013 is a deficient number, since it is larger than the sum of its proper divisors (369574611).

624644013 is a wasteful number, since it uses less digits than its factorization.

624644013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 624644013 is about 24992.8792458972. The cubic root of 624644013 is about 854.8256147205.

The spelling of 624644013 in words is "six hundred twenty-four million, six hundred forty-four thousand, thirteen".