225779400 has 480 divisors, whose sum is σ = 983062080. Its totient is φ = 46656000.

The previous prime is 225779357. The next prime is 225779419. The reversal of 225779400 is 4977522.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1247310 + ... + 1247490.

It is an arithmetic number, because the mean of its divisors is an integer number (2048046).

Almost surely, 2^225779400 is an apocalyptic number.

225779400 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 225779400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491531040).

225779400 is an abundant number, since it is smaller than the sum of its proper divisors (757282680).

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

225779400 is a wasteful number, since it uses less digits than its factorization.

225779400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 225779400 is about 15025.9575402036. The cubic root of 225779400 is about 608.9216817920.

The spelling of 225779400 in words is "two hundred twenty-five million, seven hundred seventy-nine thousand, four hundred".