28575232 has 120 divisors (see below), whose sum is σ = 71372664. Its totient is φ = 11354112.

The previous prime is 28575229. The next prime is 28575233. The reversal of 28575232 is 23257582.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28575233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426463 + ... + 426529.

Almost surely, 2^28575232 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 28575232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35686332).

28575232 is an abundant number, since it is smaller than the sum of its proper divisors (42797432).

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

28575232 is an equidigital number, since it uses as much as digits as its factorization.

28575232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 93 counting only the distinct ones).

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

The square root of 28575232 is about 5345.5806045742. The cubic root of 28575232 is about 305.7242735342.

The spelling of 28575232 in words is "twenty-eight million, five hundred seventy-five thousand, two hundred thirty-two".