11816560 has 40 divisors (see below), whose sum is σ = 31399776. Its totient is φ = 4051200.

The previous prime is 11816557. The next prime is 11816573. The reversal of 11816560 is 6561811.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9991 + ... + 11110.

Almost surely, 2^11816560 is an apocalyptic number.

11816560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11816560 is an abundant number, since it is smaller than the sum of its proper divisors (19583216).

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

11816560 is a wasteful number, since it uses less digits than its factorization.

11816560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121 (or 21115 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 11816560 is about 3437.5223635636. The cubic root of 11816560 is about 227.7702620738.

The spelling of 11816560 in words is "eleven million, eight hundred sixteen thousand, five hundred sixty".