28344432 has 40 divisors (see below), whose sum is σ = 73527040. Its totient is φ = 9408960.

The previous prime is 28344403. The next prime is 28344451. The reversal of 28344432 is 23444382.

28344432 = 159² + 160² + ... + 446².

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28344432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11919 + ... + 14097.

It is an arithmetic number, because the mean of its divisors is an integer number (1838176).

Almost surely, 2^28344432 is an apocalyptic number.

It is an amenable number.

28344432 is an abundant number, since it is smaller than the sum of its proper divisors (45182608).

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

28344432 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (28344431) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (2461).

28344432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2455 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 28344432 is about 5323.9489103484. The cubic root of 28344432 is about 304.8989434979.

The spelling of 28344432 in words is "twenty-eight million, three hundred forty-four thousand, four hundred thirty-two".