11643904 has 44 divisors (see below), whose sum is σ = 23728824. Its totient is φ = 5709824.

The previous prime is 11643901. The next prime is 11643923. The reversal of 11643904 is 40934611.

It is a super-2 number, since 2×11643904² = 271161000722432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11643901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84924 + ... + 85060.

Almost surely, 2^11643904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11643904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11864412).

11643904 is an abundant number, since it is smaller than the sum of its proper divisors (12084920).

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

11643904 is an equidigital number, since it uses as much as digits as its factorization.

11643904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 11643904 is about 3412.3165152137. The cubic root of 11643904 is about 226.6554704197.

The spelling of 11643904 in words is "eleven million, six hundred forty-three thousand, nine hundred four".