108921908 has 24 divisors (see below), whose sum is σ = 201539520. Its totient is φ = 51364800.

The previous prime is 108921877. The next prime is 108921937. The reversal of 108921908 is 809129801.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 14633 + ... + 20783.

It is an arithmetic number, because the mean of its divisors is an integer number (8397480).

Almost surely, 2^108921908 is an apocalyptic number.

It is an amenable number.

108921908 is a deficient number, since it is larger than the sum of its proper divisors (92617612).

108921908 is a wasteful number, since it uses less digits than its factorization.

108921908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407 (or 6405 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 108921908 is about 10436.5659102983. The cubic root of 108921908 is about 477.5715130962.

The spelling of 108921908 in words is "one hundred eight million, nine hundred twenty-one thousand, nine hundred eight".