225897440 has 48 divisors (see below), whose sum is σ = 537933312. Its totient is φ = 89639424.

The previous prime is 225897407. The next prime is 225897563. The reversal of 225897440 is 44798522.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14762 + ... + 25878.

It is an arithmetic number, because the mean of its divisors is an integer number (11206944).

Almost surely, 2^225897440 is an apocalyptic number.

225897440 is a gapful number since it is divisible by the number (20) 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 225897440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268966656).

225897440 is an abundant number, since it is smaller than the sum of its proper divisors (312035872).

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

225897440 is a wasteful number, since it uses less digits than its factorization.

225897440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11259 (or 11251 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 225897440 is about 15029.8848964322. The cubic root of 225897440 is about 609.0277803303.

The spelling of 225897440 in words is "two hundred twenty-five million, eight hundred ninety-seven thousand, four hundred forty".