225390620 has 96 divisors (see below), whose sum is σ = 592704000. Its totient is φ = 70089984.

The previous prime is 225390617. The next prime is 225390629. The reversal of 225390620 is 26093522.

225390620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225390629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106331 + ... + 108429.

It is an arithmetic number, because the mean of its divisors is an integer number (6174000).

Almost surely, 2^225390620 is an apocalyptic number.

225390620 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 225390620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296352000).

225390620 is an abundant number, since it is smaller than the sum of its proper divisors (367313380).

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

225390620 is a wasteful number, since it uses less digits than its factorization.

225390620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 225390620 is about 15013.0150203082. The cubic root of 225390620 is about 608.5719708439.

The spelling of 225390620 in words is "two hundred twenty-five million, three hundred ninety thousand, six hundred twenty".