12404736 has 72 divisors (see below), whose sum is σ = 35880390. Its totient is φ = 4128768.

The previous prime is 12404729. The next prime is 12404761. The reversal of 12404736 is 63740421.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 1115136 = 3360^2 + 1056^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18096 + ... + 18768.

Almost surely, 2^12404736 is an apocalyptic number.

12404736 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 12404736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17940195).

12404736 is an abundant number, since it is smaller than the sum of its proper divisors (23475654).

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

12404736 is an equidigital number, since it uses as much as digits as its factorization.

12404736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 12404736 is about 3522.0357749461. The cubic root of 12404736 is about 231.4883691582.

The spelling of 12404736 in words is "twelve million, four hundred four thousand, seven hundred thirty-six".