11515660 has 36 divisors (see below), whose sum is σ = 26193888. Its totient is φ = 4250688.

The previous prime is 11515657. The next prime is 11515667. The reversal of 11515660 is 6651511.

It is a super-2 number, since 2×11515660² = 265220850471200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11515667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1677 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (727608).

Almost surely, 2^11515660 is an apocalyptic number.

11515660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11515660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13096944).

11515660 is an abundant number, since it is smaller than the sum of its proper divisors (14678228).

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

11515660 is a wasteful number, since it uses less digits than its factorization.

11515660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3427 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 11515660 is about 3393.4731470869. The cubic root of 11515660 is about 225.8202815888.

The spelling of 11515660 in words is "eleven million, five hundred fifteen thousand, six hundred sixty".