222809400 has 384 divisors, whose sum is σ = 871372800. Its totient is φ = 52272000.

The previous prime is 222809399. The next prime is 222809413. The reversal of 222809400 is 4908222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7187385 + ... + 7187415.

It is an arithmetic number, because the mean of its divisors is an integer number (2269200).

Almost surely, 2^222809400 is an apocalyptic number.

222809400 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 222809400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435686400).

222809400 is an abundant number, since it is smaller than the sum of its proper divisors (648563400).

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

222809400 is a wasteful number, since it uses less digits than its factorization.

222809400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 222809400 is about 14926.8013988262. The cubic root of 222809400 is about 606.2398815047.

The spelling of 222809400 in words is "two hundred twenty-two million, eight hundred nine thousand, four hundred".