11415560 has 64 divisors (see below), whose sum is σ = 28652400. Its totient is φ = 4064256.

The previous prime is 11415541. The next prime is 11415577. The reversal of 11415560 is 6551411.

It can be written as a sum of positive squares in 8 ways, for example, as 3541924 + 7873636 = 1882^2 + 2806^2 .

It is a super-2 number, since 2×11415560² = 260630020227200, which contains 22 as substring.

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, 14702 + ... + 15458.

Almost surely, 2^11415560 is an apocalyptic number.

11415560 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 11415560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14326200).

11415560 is an abundant number, since it is smaller than the sum of its proper divisors (17236840).

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

11415560 is a wasteful number, since it uses less digits than its factorization.

11415560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 11415560 is about 3378.6920546271. The cubic root of 11415560 is about 225.1640614136.

Adding to 11415560 its reverse (6551411), we get a palindrome (17966971).

The spelling of 11415560 in words is "eleven million, four hundred fifteen thousand, five hundred sixty".