111115988 has 24 divisors (see below), whose sum is σ = 197241408. Its totient is φ = 54766656.

The previous prime is 111115987. The next prime is 111116011. The reversal of 111115988 is 889511111.

It is a happy number.

It is a super-2 number, since 2×111115988² = 24693525578432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111115987) 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, 116120 + ... + 117072.

It is an arithmetic number, because the mean of its divisors is an integer number (8218392).

Almost surely, 2^111115988 is an apocalyptic number.

It is an amenable number.

111115988 is a deficient number, since it is larger than the sum of its proper divisors (86125420).

111115988 is a wasteful number, since it uses less digits than its factorization.

111115988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1341 counting only the distinct ones).

The product of its digits is 2880, while the sum is 35.

The square root of 111115988 is about 10541.1568625080. The cubic root of 111115988 is about 480.7568903571.

The spelling of 111115988 in words is "one hundred eleven million, one hundred fifteen thousand, nine hundred eighty-eight".