28216230 has 32 divisors (see below), whose sum is σ = 77393664. Its totient is φ = 6449376.

The previous prime is 28216229. The next prime is 28216259. The reversal of 28216230 is 3261282.

It is a self number, because there is not a number n which added to its sum of digits gives 28216230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66972 + ... + 67391.

It is an arithmetic number, because the mean of its divisors is an integer number (2418552).

Almost surely, 2^28216230 is an apocalyptic number.

28216230 is an abundant number, since it is smaller than the sum of its proper divisors (49177434).

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

28216230 is a wasteful number, since it uses less digits than its factorization.

28216230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134380.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28216230 is about 5311.8951420374. The cubic root of 28216230 is about 304.4385622419.

The spelling of 28216230 in words is "twenty-eight million, two hundred sixteen thousand, two hundred thirty".