28252230 has 16 divisors (see below), whose sum is σ = 67805424. Its totient is φ = 7533920.

The previous prime is 28252219. The next prime is 28252243. The reversal of 28252230 is 3225282.

It is a self number, because there is not a number n which added to its sum of digits gives 28252230.

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, 470841 + ... + 470900.

It is an arithmetic number, because the mean of its divisors is an integer number (4237839).

Almost surely, 2^28252230 is an apocalyptic number.

28252230 is an abundant number, since it is smaller than the sum of its proper divisors (39553194).

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

28252230 is a wasteful number, since it uses less digits than its factorization.

28252230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941751.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28252230 is about 5315.2826829812. The cubic root of 28252230 is about 304.5679810254.

It can be divided in two parts, 28252 and 230, that added together give a palindrome (28482).

The spelling of 28252230 in words is "twenty-eight million, two hundred fifty-two thousand, two hundred thirty".