108891972 has 48 divisors (see below), whose sum is σ = 322645120. Its totient is φ = 31111776.

The previous prime is 108891971. The next prime is 108891973. The reversal of 108891972 is 279198801.

It is an interprime number because it is at equal distance from previous prime (108891971) and next prime (108891973).

It is not an unprimeable number, because it can be changed into a prime (108891971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71263 + ... + 72774.

Almost surely, 2^108891972 is an apocalyptic number.

108891972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

108891972 is an abundant number, since it is smaller than the sum of its proper divisors (213753148).

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

108891972 is a wasteful number, since it uses less digits than its factorization.

108891972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144057 (or 144049 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 108891972 is about 10435.1316235110. The cubic root of 108891972 is about 477.5277573112.

The spelling of 108891972 in words is "one hundred eight million, eight hundred ninety-one thousand, nine hundred seventy-two".