11621640 has 32 divisors (see below), whose sum is σ = 34865280. Its totient is φ = 3099072.

The previous prime is 11621639. The next prime is 11621657. The reversal of 11621640 is 4612611.

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, 48304 + ... + 48543.

It is an arithmetic number, because the mean of its divisors is an integer number (1089540).

Almost surely, 2^11621640 is an apocalyptic number.

11621640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11621640 is an abundant number, since it is smaller than the sum of its proper divisors (23243640).

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

11621640 is a wasteful number, since it uses less digits than its factorization.

11621640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96861 (or 96857 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 11621640 is about 3409.0526543308. The cubic root of 11621640 is about 226.5109176109.

The spelling of 11621640 in words is "eleven million, six hundred twenty-one thousand, six hundred forty".