225239028 has 24 divisors (see below), whose sum is σ = 600637632. Its totient is φ = 64353984.

The previous prime is 225238991. The next prime is 225239039. The reversal of 225239028 is 820932522.

It is a self number, because there is not a number n which added to its sum of digits gives 225239028.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340625 + ... + 1340792.

It is an arithmetic number, because the mean of its divisors is an integer number (25026568).

Almost surely, 2^225239028 is an apocalyptic number.

225239028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

225239028 is an abundant number, since it is smaller than the sum of its proper divisors (375398604).

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

225239028 is a wasteful number, since it uses less digits than its factorization.

225239028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681431 (or 2681429 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 225239028 is about 15007.9654850349. The cubic root of 225239028 is about 608.4355035667.

The spelling of 225239028 in words is "two hundred twenty-five million, two hundred thirty-nine thousand, twenty-eight".