28225458 has 24 divisors (see below), whose sum is σ = 62579088. Its totient is φ = 9189432.

The previous prime is 28225447. The next prime is 28225489. The reversal of 28225458 is 85452282.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17460 + ... + 19007.

It is an arithmetic number, because the mean of its divisors is an integer number (2607462).

Almost surely, 2^28225458 is an apocalyptic number.

28225458 is an abundant number, since it is smaller than the sum of its proper divisors (34353630).

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

28225458 is a wasteful number, since it uses less digits than its factorization.

28225458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36518 (or 36515 counting only the distinct ones).

The product of its digits is 51200, while the sum is 36.

The square root of 28225458 is about 5312.7636875735. The cubic root of 28225458 is about 304.4717470773.

The spelling of 28225458 in words is "twenty-eight million, two hundred twenty-five thousand, four hundred fifty-eight".