908638868 has 12 divisors (see below), whose sum is σ = 1590474900. Its totient is φ = 454217472.

The previous prime is 908638853. The next prime is 908638877. The reversal of 908638868 is 868836809.

It can be written as a sum of positive squares in 2 ways, for example, as 108201604 + 800437264 = 10402^2 + 28292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3293 + ... + 42756.

It is an arithmetic number, because the mean of its divisors is an integer number (132539575).

Almost surely, 2^908638868 is an apocalyptic number.

It is an amenable number.

908638868 is a deficient number, since it is larger than the sum of its proper divisors (681836032).

908638868 is a wasteful number, since it uses less digits than its factorization.

908638868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50986 (or 50984 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 908638868 is about 30143.6372722338. The cubic root of 908638868 is about 968.5687141981.

The spelling of 908638868 in words is "nine hundred eight million, six hundred thirty-eight thousand, eight hundred sixty-eight".