28422225 has 96 divisors (see below), whose sum is σ = 58329600. Its totient is φ = 13478400.

The previous prime is 28422221. The next prime is 28422259. The reversal of 28422225 is 52222482.

It is not a de Polignac number, because 28422225 - 2² = 28422221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28422221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 359736 + ... + 359814.

It is an arithmetic number, because the mean of its divisors is an integer number (607600).

Almost surely, 2^28422225 is an apocalyptic number.

28422225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28422225 is an abundant number, since it is smaller than the sum of its proper divisors (29907375).

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

28422225 is a wasteful number, since it uses less digits than its factorization.

28422225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 141 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 28422225 is about 5331.2498534584. The cubic root of 28422225 is about 305.1776265343.

The spelling of 28422225 in words is "twenty-eight million, four hundred twenty-two thousand, two hundred twenty-five".