12904440 has 64 divisors (see below), whose sum is σ = 39463200. Its totient is φ = 3374592.

The previous prime is 12904399. The next prime is 12904447. The reversal of 12904440 is 4440921.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12904440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12904447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5346 + ... + 7374.

Almost surely, 2^12904440 is an apocalyptic number.

12904440 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 12904440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19731600).

12904440 is an abundant number, since it is smaller than the sum of its proper divisors (26558760).

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

12904440 is a wasteful number, since it uses less digits than its factorization.

12904440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 12904440 is about 3592.2750451490. The cubic root of 12904440 is about 234.5559140055. Note that the first 3 decimals are identical.

The spelling of 12904440 in words is "twelve million, nine hundred four thousand, four hundred forty".