11631560 has 64 divisors (see below), whose sum is σ = 27993600. Its totient is φ = 4339456.

The previous prime is 11631559. The next prime is 11631589. The reversal of 11631560 is 6513611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43106 + ... + 43374.

It is an arithmetic number, because the mean of its divisors is an integer number (437400).

Almost surely, 2^11631560 is an apocalyptic number.

11631560 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 11631560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13996800).

11631560 is an abundant number, since it is smaller than the sum of its proper divisors (16362040).

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

11631560 is a wasteful number, since it uses less digits than its factorization.

11631560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11631560 is about 3410.5072936442. The cubic root of 11631560 is about 226.5753476821.

The spelling of 11631560 in words is "eleven million, six hundred thirty-one thousand, five hundred sixty".