12403972 has 24 divisors (see below), whose sum is σ = 25069184. Its totient is φ = 5260032.

The previous prime is 12403957. The next prime is 12403973. The reversal of 12403972 is 27930421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12403972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433 + ... + 4999.

Almost surely, 2^12403972 is an apocalyptic number.

It is an amenable number.

12403972 is an abundant number, since it is smaller than the sum of its proper divisors (12665212).

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

12403972 is a wasteful number, since it uses less digits than its factorization.

12403972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675 (or 4673 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 12403972 is about 3521.9273132761. The cubic root of 12403972 is about 231.4836166522.

The spelling of 12403972 in words is "twelve million, four hundred three thousand, nine hundred seventy-two".