111972798 has 48 divisors (see below), whose sum is σ = 277854720. Its totient is φ = 31924368.

The previous prime is 111972793. The next prime is 111972821. The reversal of 111972798 is 897279111.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111972793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115311 + ... + 116277.

It is an arithmetic number, because the mean of its divisors is an integer number (5788640).

Almost surely, 2^111972798 is an apocalyptic number.

111972798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

111972798 is an abundant number, since it is smaller than the sum of its proper divisors (165881922).

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

111972798 is a wasteful number, since it uses less digits than its factorization.

111972798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901 (or 1898 counting only the distinct ones).

The product of its digits is 63504, while the sum is 45.

The square root of 111972798 is about 10581.7199925154. The cubic root of 111972798 is about 481.9894254551.

The spelling of 111972798 in words is "one hundred eleven million, nine hundred seventy-two thousand, seven hundred ninety-eight".