111978160 has 40 divisors (see below), whose sum is σ = 297543456. Its totient is φ = 38392320.

The previous prime is 111978157. The next prime is 111978173. The reversal of 111978160 is 61879111.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 99421 + ... + 100540.

Almost surely, 2^111978160 is an apocalyptic number.

111978160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111978160 is an abundant number, since it is smaller than the sum of its proper divisors (185565296).

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

111978160 is a wasteful number, since it uses less digits than its factorization.

111978160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199981 (or 199975 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 34.

The square root of 111978160 is about 10581.9733509398. The cubic root of 111978160 is about 481.9971189488.

The spelling of 111978160 in words is "one hundred eleven million, nine hundred seventy-eight thousand, one hundred sixty".