11644736 has 28 divisors (see below), whose sum is σ = 23550372. Its totient is φ = 5710848.

The previous prime is 11644733. The next prime is 11644769. The reversal of 11644736 is 63744611.

It can be written as a sum of positive squares in 2 ways, for example, as 6150400 + 5494336 = 2480^2 + 2344^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676 + ... + 5108.

Almost surely, 2^11644736 is an apocalyptic number.

11644736 is a gapful number since it is divisible by the number (16) 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 11644736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11775186).

11644736 is an abundant number, since it is smaller than the sum of its proper divisors (11905636).

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

11644736 is an equidigital number, since it uses as much as digits as its factorization.

11644736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498 (or 3488 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 11644736 is about 3412.4384243529. The cubic root of 11644736 is about 226.6608687483.

The spelling of 11644736 in words is "eleven million, six hundred forty-four thousand, seven hundred thirty-six".