12644430 has 32 divisors (see below), whose sum is σ = 32133024. Its totient is φ = 3173376.

The previous prime is 12644393. The next prime is 12644459. The reversal of 12644430 is 3444621.

It is a super-2 number, since 2×12644430² = 319763220049800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12644430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11887 + ... + 12906.

It is an arithmetic number, because the mean of its divisors is an integer number (1004157).

Almost surely, 2^12644430 is an apocalyptic number.

12644430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12644430 is an abundant number, since it is smaller than the sum of its proper divisors (19488594).

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

12644430 is a wasteful number, since it uses less digits than its factorization.

12644430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24820.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 12644430 is about 3555.9007297730. The cubic root of 12644430 is about 232.9698672251.

The spelling of 12644430 in words is "twelve million, six hundred forty-four thousand, four hundred thirty".