11644920 has 96 divisors (see below), whose sum is σ = 43261920. Its totient is φ = 2661120.

The previous prime is 11644909. The next prime is 11644937. The reversal of 11644920 is 2944611.

11644920 is a `hidden beast` number, since 11 + 644 + 9 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210 + ... + 4830.

It is an arithmetic number, because the mean of its divisors is an integer number (450645).

Almost surely, 2^11644920 is an apocalyptic number.

11644920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11644920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21630960).

11644920 is an abundant number, since it is smaller than the sum of its proper divisors (31617000).

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

11644920 is a wasteful number, since it uses less digits than its factorization.

11644920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 11644920 is about 3412.4653844398. The cubic root of 11644920 is about 226.6620625747.

It can be divided in two parts, 1164 and 4920, that added together give a square (6084 = 78²).

The spelling of 11644920 in words is "eleven million, six hundred forty-four thousand, nine hundred twenty".