22425228 has 48 divisors (see below), whose sum is σ = 66447360. Its totient is φ = 6406992.

The previous prime is 22425223. The next prime is 22425233. The reversal of 22425228 is 82252422.

It is an interprime number because it is at equal distance from previous prime (22425223) and next prime (22425233).

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 (22425223) 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, 14076 + ... + 15587.

It is an arithmetic number, because the mean of its divisors is an integer number (1384320).

Almost surely, 2^22425228 is an apocalyptic number.

22425228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22425228 is an abundant number, since it is smaller than the sum of its proper divisors (44022132).

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

22425228 is a wasteful number, since it uses less digits than its factorization.

22425228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29683 (or 29675 counting only the distinct ones).

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

The square root of 22425228 is about 4735.5282704256. The cubic root of 22425228 is about 281.9977365142.

It can be divided in two parts, 224 and 25228, that added together give a palindrome (25452).

The spelling of 22425228 in words is "twenty-two million, four hundred twenty-five thousand, two hundred twenty-eight".