630015638 has 12 divisors (see below), whose sum is σ = 1099313172. Its totient is φ = 270006660.

The previous prime is 630015637. The next prime is 630015641. The reversal of 630015638 is 836510036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630015637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3214268 + ... + 3214463.

It is an arithmetic number, because the mean of its divisors is an integer number (91609431).

Almost surely, 2^630015638 is an apocalyptic number.

630015638 is a deficient number, since it is larger than the sum of its proper divisors (469297534).

630015638 is a wasteful number, since it uses less digits than its factorization.

630015638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428747 (or 6428740 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 630015638 is about 25100.1123105057. The cubic root of 630015638 is about 857.2689812210.

The spelling of 630015638 in words is "six hundred thirty million, fifteen thousand, six hundred thirty-eight".