12576440 has 48 divisors (see below), whose sum is σ = 29176200. Its totient is φ = 4877568.

The previous prime is 12576427. The next prime is 12576449. The reversal of 12576440 is 4467521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12576449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172244 + ... + 172316.

Almost surely, 2^12576440 is an apocalyptic number.

12576440 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 12576440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14588100).

12576440 is an abundant number, since it is smaller than the sum of its proper divisors (16599760).

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

12576440 is an equidigital number, since it uses as much as digits as its factorization.

12576440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 12576440 is about 3546.3276780354. The cubic root of 12576440 is about 232.5515513700.

The spelling of 12576440 in words is "twelve million, five hundred seventy-six thousand, four hundred forty".