11687640 has 32 divisors (see below), whose sum is σ = 35063280. Its totient is φ = 3116672.

The previous prime is 11687639. The next prime is 11687677. The reversal of 11687640 is 4678611.

It is a happy number.

11687640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 48579 + ... + 48818.

Almost surely, 2^11687640 is an apocalyptic number.

11687640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11687640 is an abundant number, since it is smaller than the sum of its proper divisors (23375640).

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

11687640 is a wasteful number, since it uses less digits than its factorization.

11687640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97411 (or 97407 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 11687640 is about 3418.7190583609. The cubic root of 11687640 is about 226.9388982111.

The spelling of 11687640 in words is "eleven million, six hundred eighty-seven thousand, six hundred forty".