108021858 has 16 divisors (see below), whose sum is σ = 246907200. Its totient is φ = 30863376.

The previous prime is 108021857. The next prime is 108021877. The reversal of 108021858 is 858120801.

It is not an unprimeable number, because it can be changed into a prime (108021853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285933 + ... + 1286016.

It is an arithmetic number, because the mean of its divisors is an integer number (15431700).

Almost surely, 2^108021858 is an apocalyptic number.

108021858 is an abundant number, since it is smaller than the sum of its proper divisors (138885342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

108021858 is a wasteful number, since it uses less digits than its factorization.

108021858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571961.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 108021858 is about 10393.3564357237. The cubic root of 108021858 is about 476.2524406568.

The spelling of 108021858 in words is "one hundred eight million, twenty-one thousand, eight hundred fifty-eight".