108601990 has 32 divisors (see below), whose sum is σ = 230621184. Its totient is φ = 36033120.

The previous prime is 108601979. The next prime is 108602003. The reversal of 108601990 is 99106801.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 22854 + ... + 27193.

It is an arithmetic number, because the mean of its divisors is an integer number (7206912).

Almost surely, 2^108601990 is an apocalyptic number.

108601990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108601990 is an abundant number, since it is smaller than the sum of its proper divisors (122019194).

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

108601990 is a wasteful number, since it uses less digits than its factorization.

108601990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50092.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 108601990 is about 10421.2278547204. The cubic root of 108601990 is about 477.1034910895.

The spelling of 108601990 in words is "one hundred eight million, six hundred one thousand, nine hundred ninety".