108921830 has 32 divisors (see below), whose sum is σ = 202704768. Its totient is φ = 42112000.

The previous prime is 108921829. The next prime is 108921863. The reversal of 108921830 is 38129801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45155 + ... + 47505.

It is an arithmetic number, because the mean of its divisors is an integer number (6334524).

Almost surely, 2^108921830 is an apocalyptic number.

108921830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108921830 is a deficient number, since it is larger than the sum of its proper divisors (93782938).

108921830 is a wasteful number, since it uses less digits than its factorization.

108921830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 108921830 is about 10436.5621734362. The cubic root of 108921830 is about 477.5713990983.

The spelling of 108921830 in words is "one hundred eight million, nine hundred twenty-one thousand, eight hundred thirty".