11801640 has 32 divisors (see below), whose sum is σ = 35405280. Its totient is φ = 3147072.

The previous prime is 11801639. The next prime is 11801663. The reversal of 11801640 is 4610811.

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, 49054 + ... + 49293.

It is an arithmetic number, because the mean of its divisors is an integer number (1106415).

Almost surely, 2^11801640 is an apocalyptic number.

11801640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11801640 is an abundant number, since it is smaller than the sum of its proper divisors (23603640).

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

11801640 is a wasteful number, since it uses less digits than its factorization.

11801640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98361 (or 98357 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11801640 is about 3435.3515103989. The cubic root of 11801640 is about 227.6743581447.

The spelling of 11801640 in words is "eleven million, eight hundred one thousand, six hundred forty".