624426644 has 12 divisors (see below), whose sum is σ = 1094940000. Its totient is φ = 311586648.

The previous prime is 624426629. The next prime is 624426653. The reversal of 624426644 is 446624426.

It is a junction number, because it is equal to n+sod(n) for n = 624426598 and 624426607.

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, 154424 + ... + 158415.

It is an arithmetic number, because the mean of its divisors is an integer number (91245000).

Almost surely, 2^624426644 is an apocalyptic number.

It is an amenable number.

624426644 is a deficient number, since it is larger than the sum of its proper divisors (470513356).

624426644 is a wasteful number, since it uses less digits than its factorization.

624426644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313342 (or 313340 counting only the distinct ones).

The product of its digits is 221184, while the sum is 38.

The square root of 624426644 is about 24988.5302488962. The cubic root of 624426644 is about 854.7264466915.

The spelling of 624426644 in words is "six hundred twenty-four million, four hundred twenty-six thousand, six hundred forty-four".