109908990 has 48 divisors (see below), whose sum is σ = 286281216. Its totient is φ = 29256000.

The previous prime is 109908971. The next prime is 109908991. The reversal of 109908990 is 99809901.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109908991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94915 + ... + 96065.

It is an arithmetic number, because the mean of its divisors is an integer number (5964192).

Almost surely, 2^109908990 is an apocalyptic number.

109908990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109908990 is an abundant number, since it is smaller than the sum of its proper divisors (176372226).

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

109908990 is a wasteful number, since it uses less digits than its factorization.

109908990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225 (or 2222 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The square root of 109908990 is about 10483.7488523905. The cubic root of 109908990 is about 479.0098076946.

The spelling of 109908990 in words is "one hundred nine million, nine hundred eight thousand, nine hundred ninety".