638530862 has 16 divisors (see below), whose sum is σ = 964275840. Its totient is φ = 317113272.

The previous prime is 638530819. The next prime is 638530877. The reversal of 638530862 is 268035836.

638530862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197753 + ... + 200955.

It is an arithmetic number, because the mean of its divisors is an integer number (60267240).

Almost surely, 2^638530862 is an apocalyptic number.

638530862 is a deficient number, since it is larger than the sum of its proper divisors (325744978).

638530862 is a wasteful number, since it uses less digits than its factorization.

638530862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 638530862 is about 25269.1682094999. The cubic root of 638530862 is about 861.1139620813.

The spelling of 638530862 in words is "six hundred thirty-eight million, five hundred thirty thousand, eight hundred sixty-two".