111990540 has 48 divisors (see below), whose sum is σ = 314576640. Its totient is φ = 29768640.

The previous prime is 111990539. The next prime is 111990563. The reversal of 111990540 is 45099111.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 111990498 and 111990507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17041 + ... + 22679.

It is an arithmetic number, because the mean of its divisors is an integer number (6553680).

Almost surely, 2^111990540 is an apocalyptic number.

111990540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111990540 is an abundant number, since it is smaller than the sum of its proper divisors (202586100).

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

111990540 is a wasteful number, since it uses less digits than its factorization.

111990540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5982 (or 5980 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 111990540 is about 10582.5582918310. The cubic root of 111990540 is about 482.0148810566.

The spelling of 111990540 in words is "one hundred eleven million, nine hundred ninety thousand, five hundred forty".