11515560 has 64 divisors (see below), whose sum is σ = 39484800. Its totient is φ = 2631936.

The previous prime is 11515541. The next prime is 11515589. The reversal of 11515560 is 6551511.

It is a super-2 number, since 2×11515560² = 265216244227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11515560.

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, 6015 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (616950).

Almost surely, 2^11515560 is an apocalyptic number.

11515560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11515560 is an abundant number, since it is smaller than the sum of its proper divisors (27969240).

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

11515560 is a wasteful number, since it uses less digits than its factorization.

11515560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13730 (or 13726 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 11515560 is about 3393.4584128879. The cubic root of 11515560 is about 225.8196279254.

The spelling of 11515560 in words is "eleven million, five hundred fifteen thousand, five hundred sixty".