28235872 has 48 divisors (see below), whose sum is σ = 63921312. Its totient is φ = 12026880.

The previous prime is 28235869. The next prime is 28235887. The reversal of 28235872 is 27853282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51922 + ... + 52462.

It is an arithmetic number, because the mean of its divisors is an integer number (1331694).

Almost surely, 2^28235872 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 28235872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31960656).

28235872 is an abundant number, since it is smaller than the sum of its proper divisors (35685440).

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

28235872 is a wasteful number, since it uses less digits than its factorization.

28235872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 783 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 28235872 is about 5313.7436897163. The cubic root of 28235872 is about 304.5091882046.

The spelling of 28235872 in words is "twenty-eight million, two hundred thirty-five thousand, eight hundred seventy-two".