28607232 has 54 divisors (see below), whose sum is σ = 76533492. Its totient is φ = 9486336.

The previous prime is 28607219. The next prime is 28607233. The reversal of 28607232 is 23270682.

It is a self number, because there is not a number n which added to its sum of digits gives 28607232.

It is not an unprimeable number, because it can be changed into a prime (28607233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148128 + ... + 148320.

Almost surely, 2^28607232 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 28607232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38266746).

28607232 is an abundant number, since it is smaller than the sum of its proper divisors (47926260).

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

28607232 is an frugal number, since it uses more digits than its factorization.

28607232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28607232 is about 5348.5728937727. The cubic root of 28607232 is about 305.8383528310.

The spelling of 28607232 in words is "twenty-eight million, six hundred seven thousand, two hundred thirty-two".