111891372 has 24 divisors (see below), whose sum is σ = 263617536. Its totient is φ = 36934608.

The previous prime is 111891359. The next prime is 111891379. The reversal of 111891372 is 273198111.

It is not an unprimeable number, because it can be changed into a prime (111891379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44028 + ... + 46499.

It is an arithmetic number, because the mean of its divisors is an integer number (10984064).

Almost surely, 2^111891372 is an apocalyptic number.

111891372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111891372 is an abundant number, since it is smaller than the sum of its proper divisors (151726164).

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

111891372 is a wasteful number, since it uses less digits than its factorization.

111891372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90637 (or 90635 counting only the distinct ones).

The product of its digits is 3024, while the sum is 33.

The square root of 111891372 is about 10577.8718086390. The cubic root of 111891372 is about 481.8725637745.

It can be divided in two parts, 11189 and 1372, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 111891372 in words is "one hundred eleven million, eight hundred ninety-one thousand, three hundred seventy-two".