11919880 has 32 divisors (see below), whose sum is σ = 30651840. Its totient is φ = 4086720.

The previous prime is 11919863. The next prime is 11919923. The reversal of 11919880 is 8891911.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21006 + ... + 21565.

It is an arithmetic number, because the mean of its divisors is an integer number (957870).

Almost surely, 2^11919880 is an apocalyptic number.

11919880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11919880 is an abundant number, since it is smaller than the sum of its proper divisors (18731960).

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

11919880 is a wasteful number, since it uses less digits than its factorization.

11919880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42589 (or 42585 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 11919880 is about 3452.5179217493. The cubic root of 11919880 is about 228.4321852810.

The spelling of 11919880 in words is "eleven million, nine hundred nineteen thousand, eight hundred eighty".