11631880 has 32 divisors (see below), whose sum is σ = 28186200. Its totient is φ = 4294656.

The previous prime is 11631877. The next prime is 11631899. The reversal of 11631880 is 8813611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7043716 + 4588164 = 2654^2 + 2142^2 .

It is a super-4 number, since 4×11631880⁴ (a number of 29 digits) contains 4444 as substring.

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, 10665 + ... + 11704.

Almost surely, 2^11631880 is an apocalyptic number.

11631880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11631880 is an abundant number, since it is smaller than the sum of its proper divisors (16554320).

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

11631880 is a wasteful number, since it uses less digits than its factorization.

11631880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22393 (or 22389 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 11631880 is about 3410.5542071634. The cubic root of 11631880 is about 226.5774254614.

The spelling of 11631880 in words is "eleven million, six hundred thirty-one thousand, eight hundred eighty".