109992990 has 32 divisors (see below), whose sum is σ = 266412960. Its totient is φ = 29061504.

The previous prime is 109992989. The next prime is 109993003. The reversal of 109992990 is 99299901.

It is a Curzon 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, 13549 + ... + 20088.

It is an arithmetic number, because the mean of its divisors is an integer number (8325405).

Almost surely, 2^109992990 is an apocalyptic number.

109992990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109992990 is an abundant number, since it is smaller than the sum of its proper divisors (156419970).

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

109992990 is a wasteful number, since it uses less digits than its factorization.

109992990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33756.

The product of its (nonzero) digits is 118098, while the sum is 48.

The square root of 109992990 is about 10487.7542877396. The cubic root of 109992990 is about 479.1318073527.

The spelling of 109992990 in words is "one hundred nine million, nine hundred ninety-two thousand, nine hundred ninety".