868928638 has 16 divisors (see below), whose sum is σ = 1361111040. Its totient is φ = 415254136.

The previous prime is 868928629. The next prime is 868928647. The reversal of 868928638 is 836829868.

It is an interprime number because it is at equal distance from previous prime (868928629) and next prime (868928647).

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, 59631 + ... + 72757.

It is an arithmetic number, because the mean of its divisors is an integer number (85069440).

Almost surely, 2^868928638 is an apocalyptic number.

868928638 is a deficient number, since it is larger than the sum of its proper divisors (492182402).

868928638 is a wasteful number, since it uses less digits than its factorization.

868928638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14591.

The product of its digits is 7962624, while the sum is 58.

The square root of 868928638 is about 29477.5955260941. The cubic root of 868928638 is about 954.2482458687.

The spelling of 868928638 in words is "eight hundred sixty-eight million, nine hundred twenty-eight thousand, six hundred thirty-eight".