28755232 has 48 divisors (see below), whose sum is σ = 62282304. Its totient is φ = 12960000.

The previous prime is 28755193. The next prime is 28755239. The reversal of 28755232 is 23255782.

It is not an unprimeable number, because it can be changed into a prime (28755239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52882 + ... + 53422.

It is an arithmetic number, because the mean of its divisors is an integer number (1297548).

Almost surely, 2^28755232 is an apocalyptic number.

28755232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28755232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31141152).

28755232 is an abundant number, since it is smaller than the sum of its proper divisors (33527072).

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

28755232 is a wasteful number, since it uses less digits than its factorization.

28755232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 705 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 28755232 is about 5362.3905117028. The cubic root of 28755232 is about 306.3648658662.

The spelling of 28755232 in words is "twenty-eight million, seven hundred fifty-five thousand, two hundred thirty-two".