28288932 has 24 divisors (see below), whose sum is σ = 75437376. Its totient is φ = 8082528.

The previous prime is 28288927. The next prime is 28288943. The reversal of 28288932 is 23988282.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 168303 + ... + 168470.

It is an arithmetic number, because the mean of its divisors is an integer number (3143224).

Almost surely, 2^28288932 is an apocalyptic number.

It is an amenable number.

28288932 is an abundant number, since it is smaller than the sum of its proper divisors (47148444).

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

28288932 is a wasteful number, since it uses less digits than its factorization.

28288932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336787 (or 336785 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 28288932 is about 5318.7340599056. The cubic root of 28288932 is about 304.6998103481.

The spelling of 28288932 in words is "twenty-eight million, two hundred eighty-eight thousand, nine hundred thirty-two".