225644988 has 24 divisors (see below), whose sum is σ = 554216320. Its totient is φ = 71256240.

The previous prime is 225644977. The next prime is 225645023. The reversal of 225644988 is 889446522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494608 + ... + 495063.

Almost surely, 2^225644988 is an apocalyptic number.

It is an amenable number.

225644988 is an abundant number, since it is smaller than the sum of its proper divisors (328571332).

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

225644988 is a wasteful number, since it uses less digits than its factorization.

225644988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989697 (or 989695 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 225644988 is about 15021.4842142846. The cubic root of 225644988 is about 608.8008224810.

The spelling of 225644988 in words is "two hundred twenty-five million, six hundred forty-four thousand, nine hundred eighty-eight".