28703232 has 60 divisors (see below), whose sum is σ = 82852770. Its totient is φ = 9566208.

The previous prime is 28703203. The next prime is 28703249. The reversal of 28703232 is 23230782.

It can be written as a sum of positive squares in only one way, i.e., 24443136 + 4260096 = 4944^2 + 2064^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28703196 and 28703205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1494 + ... + 7722.

Almost surely, 2^28703232 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 28703232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41426385).

28703232 is an abundant number, since it is smaller than the sum of its proper divisors (54149538).

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

28703232 is an equidigital number, since it uses as much as digits as its factorization.

28703232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6253 (or 6234 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 28703232 is about 5357.5397338704. The cubic root of 28703232 is about 306.1800811089.

The spelling of 28703232 in words is "twenty-eight million, seven hundred three thousand, two hundred thirty-two".