111978258 has 32 divisors (see below), whose sum is σ = 256435200. Its totient is φ = 31933200.

The previous prime is 111978247. The next prime is 111978259. The reversal of 111978258 is 852879111.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (111978259) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22933 + ... + 27383.

It is an arithmetic number, because the mean of its divisors is an integer number (8013600).

Almost surely, 2^111978258 is an apocalyptic number.

111978258 is an abundant number, since it is smaller than the sum of its proper divisors (144456942).

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

111978258 is a wasteful number, since it uses less digits than its factorization.

111978258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062.

The product of its digits is 40320, while the sum is 42.

The square root of 111978258 is about 10581.9779814551. The cubic root of 111978258 is about 481.9972595587.

The spelling of 111978258 in words is "one hundred eleven million, nine hundred seventy-eight thousand, two hundred fifty-eight".