108161920 has 32 divisors (see below), whose sum is σ = 258576120. Its totient is φ = 43264512.

The previous prime is 108161903. The next prime is 108161947. The reversal of 108161920 is 29161801.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83862 + ... + 85141.

Almost surely, 2^108161920 is an apocalyptic number.

108161920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108161920 is an abundant number, since it is smaller than the sum of its proper divisors (150414200).

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

108161920 is an equidigital number, since it uses as much as digits as its factorization.

108161920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169022 (or 169010 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 108161920 is about 10400.0923072827. The cubic root of 108161920 is about 476.4581893244.

It can be divided in two parts, 1081 and 61920, that added together give a square (63001 = 251²).

The spelling of 108161920 in words is "one hundred eight million, one hundred sixty-one thousand, nine hundred twenty".