28432832 has 28 divisors (see below), whose sum is σ = 57354216. Its totient is φ = 13981440.

The previous prime is 28432819. The next prime is 28432879. The reversal of 28432832 is 23823482.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263 + ... + 7545.

Almost surely, 2^28432832 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 28432832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28677108).

28432832 is an abundant number, since it is smaller than the sum of its proper divisors (28921384).

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

28432832 is an equidigital number, since it uses as much as digits as its factorization.

28432832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7356 (or 7346 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 28432832 is about 5332.2445555319. The cubic root of 28432832 is about 305.2155852854.

The spelling of 28432832 in words is "twenty-eight million, four hundred thirty-two thousand, eight hundred thirty-two".