11399880 has 32 divisors (see below), whose sum is σ = 34200000. Its totient is φ = 3039936.

The previous prime is 11399879. The next prime is 11399891. The reversal of 11399880 is 8899311.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 47380 + ... + 47619.

It is an arithmetic number, because the mean of its divisors is an integer number (1068750).

Almost surely, 2^11399880 is an apocalyptic number.

11399880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11399880 is an abundant number, since it is smaller than the sum of its proper divisors (22800120).

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

11399880 is a wasteful number, since it uses less digits than its factorization.

11399880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95013 (or 95009 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 11399880 is about 3376.3708327137. The cubic root of 11399880 is about 225.0609217747.

The spelling of 11399880 in words is "eleven million, three hundred ninety-nine thousand, eight hundred eighty".