28230656 has 44 divisors (see below), whose sum is σ = 59444880. Its totient is φ = 13363200.

The previous prime is 28230647. The next prime is 28230701. The reversal of 28230656 is 65603282.

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

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, 18731 + ... + 20181.

It is an arithmetic number, because the mean of its divisors is an integer number (1351020).

Almost surely, 2^28230656 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 28230656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29722440).

28230656 is an abundant number, since it is smaller than the sum of its proper divisors (31214224).

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

28230656 is a wasteful number, since it uses less digits than its factorization.

28230656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 28230656 is about 5313.2528643007. The cubic root of 28230656 is about 304.4904364345.

The spelling of 28230656 in words is "twenty-eight million, two hundred thirty thousand, six hundred fifty-six".