638783034 has 16 divisors (see below), whose sum is σ = 1308726720. Its totient is φ = 207734240.

The previous prime is 638783027. The next prime is 638783051. The reversal of 638783034 is 430387836.

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

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 7 ways as a sum of consecutive naturals, for example, 1298094 + ... + 1298585.

It is an arithmetic number, because the mean of its divisors is an integer number (81795420).

Almost surely, 2^638783034 is an apocalyptic number.

638783034 is an abundant number, since it is smaller than the sum of its proper divisors (669943686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638783034 is a wasteful number, since it uses less digits than its factorization.

638783034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596725.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 638783034 is about 25274.1574340274. The cubic root of 638783034 is about 861.2273057286.

The spelling of 638783034 in words is "six hundred thirty-eight million, seven hundred eighty-three thousand, thirty-four".