12398432 has 24 divisors (see below), whose sum is σ = 24569496. Its totient is φ = 6158592.

The previous prime is 12398429. The next prime is 12398467. The reversal of 12398432 is 23489321.

It is a happy number.

It is a super-2 number, since 2×12398432² = 307442232117248, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4028 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (1023729).

Almost surely, 2^12398432 is an apocalyptic number.

It is an amenable number.

12398432 is a deficient number, since it is larger than the sum of its proper divisors (12171064).

12398432 is a wasteful number, since it uses less digits than its factorization.

12398432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550 (or 2542 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 12398432 is about 3521.1407242540. The cubic root of 12398432 is about 231.4491489240.

The spelling of 12398432 in words is "twelve million, three hundred ninety-eight thousand, four hundred thirty-two".