28225860 has 48 divisors (see below), whose sum is σ = 85114176. Its totient is φ = 6947712.

The previous prime is 28225843. The next prime is 28225867. The reversal of 28225860 is 6852282.

It is not an unprimeable number, because it can be changed into a prime (28225867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17314 + ... + 18873.

It is an arithmetic number, because the mean of its divisors is an integer number (1773212).

Almost surely, 2^28225860 is an apocalyptic number.

28225860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28225860 is an abundant number, since it is smaller than the sum of its proper divisors (56888316).

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

28225860 is a wasteful number, since it uses less digits than its factorization.

28225860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36212 (or 36210 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 28225860 is about 5312.8015208551. The cubic root of 28225860 is about 304.4731925462.

The spelling of 28225860 in words is "twenty-eight million, two hundred twenty-five thousand, eight hundred sixty".