28339392 has 56 divisors (see below), whose sum is σ = 76134976. Its totient is φ = 9301248.

The previous prime is 28339369. The next prime is 28339397. The reversal of 28339392 is 29393382.

It is a super-2 number, since 2×28339392² = 1606242277859328, 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 28339392.

It is not an unprimeable number, because it can be changed into a prime (28339397) 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, 11763 + ... + 13965.

Almost surely, 2^28339392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28339392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38067488).

28339392 is an abundant number, since it is smaller than the sum of its proper divisors (47795584).

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

28339392 is a wasteful number, since it uses less digits than its factorization.

28339392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2275 counting only the distinct ones).

The product of its digits is 69984, while the sum is 39.

The square root of 28339392 is about 5323.4755564387. The cubic root of 28339392 is about 304.8808707918.

The spelling of 28339392 in words is "twenty-eight million, three hundred thirty-nine thousand, three hundred ninety-two".