225998784 has 168 divisors, whose sum is σ = 721077552. Its totient is φ = 67092480.

The previous prime is 225998771. The next prime is 225998809. The reversal of 225998784 is 487899522.

It is a self number, because there is not a number n which added to its sum of digits gives 225998784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335472 + ... + 336144.

Almost surely, 2^225998784 is an apocalyptic number.

225998784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225998784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360538776).

225998784 is an abundant number, since it is smaller than the sum of its proper divisors (495078768).

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

225998784 is a wasteful number, since it uses less digits than its factorization.

225998784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 742 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 225998784 is about 15033.2559347601. The cubic root of 225998784 is about 609.1188424271.

The spelling of 225998784 in words is "two hundred twenty-five million, nine hundred ninety-eight thousand, seven hundred eighty-four".