11615880 has 32 divisors (see below), whose sum is σ = 34848000. Its totient is φ = 3097536.

The previous prime is 11615867. The next prime is 11615887. The reversal of 11615880 is 8851611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (11615887) 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 7 ways as a sum of consecutive naturals, for example, 48280 + ... + 48519.

It is an arithmetic number, because the mean of its divisors is an integer number (1089000).

Almost surely, 2^11615880 is an apocalyptic number.

11615880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11615880 is an abundant number, since it is smaller than the sum of its proper divisors (23232120).

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

11615880 is a wasteful number, since it uses less digits than its factorization.

11615880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96813 (or 96809 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 11615880 is about 3408.2077401473. The cubic root of 11615880 is about 226.4734897753.

The spelling of 11615880 in words is "eleven million, six hundred fifteen thousand, eight hundred eighty".