109231920 has 120 divisors (see below), whose sum is σ = 419261856. Its totient is φ = 24966144.

The previous prime is 109231891. The next prime is 109231921. The reversal of 109231920 is 29132901.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×109231920² = 23863224693772800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109231921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5797 + ... + 15876.

Almost surely, 2^109231920 is an apocalyptic number.

109231920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109231920 is an abundant number, since it is smaller than the sum of its proper divisors (310029936).

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

109231920 is a wasteful number, since it uses less digits than its factorization.

109231920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21699 (or 21690 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 109231920 is about 10451.4075607068. The cubic root of 109231920 is about 478.0241696899.

The spelling of 109231920 in words is "one hundred nine million, two hundred thirty-one thousand, nine hundred twenty".