111981488 has 20 divisors (see below), whose sum is σ = 218676480. Its totient is φ = 55548864.

The previous prime is 111981487. The next prime is 111981511. The reversal of 111981488 is 884189111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (111981481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25523 + ... + 29586.

It is an arithmetic number, because the mean of its divisors is an integer number (10933824).

Almost surely, 2^111981488 is an apocalyptic number.

It is an amenable number.

111981488 is a deficient number, since it is larger than the sum of its proper divisors (106694992).

111981488 is a wasteful number, since it uses less digits than its factorization.

111981488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55244 (or 55238 counting only the distinct ones).

The product of its digits is 18432, while the sum is 41.

The square root of 111981488 is about 10582.1305983247. The cubic root of 111981488 is about 482.0018938993.

The spelling of 111981488 in words is "one hundred eleven million, nine hundred eighty-one thousand, four hundred eighty-eight".