630638 has 8 divisors (see below), whose sum is σ = 968088. Its totient is φ = 307944.

The previous prime is 630613. The next prime is 630659. The reversal of 630638 is 836036.

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

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 in 3 ways as a sum of consecutive naturals, for example, 3581 + ... + 3752.

It is an arithmetic number, because the mean of its divisors is an integer number (121011).

2⁶³⁰⁶³⁸ is an apocalyptic number.

630638 is a deficient number, since it is larger than the sum of its proper divisors (337450).

630638 is a wasteful number, since it uses less digits than its factorization.

630638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7378.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 630638 is about 794.1271938424. The cubic root of 630638 is about 85.7551173185.

The spelling of 630638 in words is "six hundred thirty thousand, six hundred thirty-eight".