624638 has 8 divisors (see below), whose sum is σ = 1070832. Its totient is φ = 267696.

The previous prime is 624607. The next prime is 624643. The reversal of 624638 is 836426.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 624638.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 624638.

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 in 3 ways as a sum of consecutive naturals, for example, 22295 + ... + 22322.

It is an arithmetic number, because the mean of its divisors is an integer number (133854).

2⁶²⁴⁶³⁸ is an apocalyptic number.

624638 is a deficient number, since it is larger than the sum of its proper divisors (446194).

624638 is a wasteful number, since it uses less digits than its factorization.

624638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44626.

The product of its digits is 6912, while the sum is 29.

The square root of 624638 is about 790.3404329781. The cubic root of 624638 is about 85.4822871781.

The spelling of 624638 in words is "six hundred twenty-four thousand, six hundred thirty-eight".