11995560 has 128 divisors (see below), whose sum is σ = 41472000. Its totient is φ = 3080448.

The previous prime is 11995547. The next prime is 11995567. The reversal of 11995560 is 6559911.

11995560 is a `hidden beast` number, since 1 + 1 + 9 + 95 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11995567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31129 + ... + 31511.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

Almost surely, 2^11995560 is an apocalyptic number.

11995560 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 11995560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20736000).

11995560 is an abundant number, since it is smaller than the sum of its proper divisors (29476440).

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

11995560 is a wasteful number, since it uses less digits than its factorization.

11995560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 11995560 is about 3463.4606970485. The cubic root of 11995560 is about 228.9146087428.

The spelling of 11995560 in words is "eleven million, nine hundred ninety-five thousand, five hundred sixty".