111939640 has 32 divisors (see below), whose sum is σ = 265122000. Its totient is φ = 42418944.

The previous prime is 111939629. The next prime is 111939703. The reversal of 111939640 is 46939111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111939596 and 111939605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72885 + ... + 74404.

Almost surely, 2^111939640 is an apocalyptic number.

111939640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111939640 is an abundant number, since it is smaller than the sum of its proper divisors (153182360).

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

111939640 is a wasteful number, since it uses less digits than its factorization.

111939640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147319 (or 147315 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 111939640 is about 10580.1531179846. The cubic root of 111939640 is about 481.9418443061.

The spelling of 111939640 in words is "one hundred eleven million, nine hundred thirty-nine thousand, six hundred forty".