11987520 has 56 divisors (see below), whose sum is σ = 38063424. Its totient is φ = 3196416.

The previous prime is 11987501. The next prime is 11987579. The reversal of 11987520 is 2578911.

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, 5284 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (679704).

Almost surely, 2^11987520 is an apocalyptic number.

11987520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11987520 is an abundant number, since it is smaller than the sum of its proper divisors (26075904).

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

11987520 is a wasteful number, since it uses less digits than its factorization.

11987520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12507 (or 12497 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 11987520 is about 3462.2998137076. The cubic root of 11987520 is about 228.8634541268.

The spelling of 11987520 in words is "eleven million, nine hundred eighty-seven thousand, five hundred twenty".