111680988 has 12 divisors (see below), whose sum is σ = 260589000. Its totient is φ = 37226992.

The previous prime is 111680981. The next prime is 111681023. The reversal of 111680988 is 889086111.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×111680988² = 24945286161312288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111680981) 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, 4653363 + ... + 4653386.

It is an arithmetic number, because the mean of its divisors is an integer number (21715750).

Almost surely, 2^111680988 is an apocalyptic number.

It is an amenable number.

111680988 is an abundant number, since it is smaller than the sum of its proper divisors (148908012).

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

111680988 is a wasteful number, since it uses less digits than its factorization.

111680988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9306756 (or 9306754 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 42.

The square root of 111680988 is about 10567.9225962343. The cubic root of 111680988 is about 481.5703603040.

The spelling of 111680988 in words is "one hundred eleven million, six hundred eighty thousand, nine hundred eighty-eight".