638965030 has 16 divisors (see below), whose sum is σ = 1254695184. Its totient is φ = 232350880.

The previous prime is 638965021. The next prime is 638965031. The reversal of 638965030 is 30569836.

638965030 is nontrivially palindromic in base 4.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638965031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2904277 + ... + 2904496.

It is an arithmetic number, because the mean of its divisors is an integer number (78418449).

Almost surely, 2^638965030 is an apocalyptic number.

638965030 is a deficient number, since it is larger than the sum of its proper divisors (615730154).

638965030 is a wasteful number, since it uses less digits than its factorization.

638965030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808791.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 638965030 is about 25277.7576141556. The cubic root of 638965030 is about 861.3090888658.

The spelling of 638965030 in words is "six hundred thirty-eight million, nine hundred sixty-five thousand, thirty".