222002400 has 144 divisors (see below), whose sum is σ = 727547184. Its totient is φ = 58798080.

The previous prime is 222002393. The next prime is 222002461. The reversal of 222002400 is 4200222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

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, 559002 + ... + 559398.

It is an arithmetic number, because the mean of its divisors is an integer number (5052411).

Almost surely, 2^222002400 is an apocalyptic number.

222002400 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 222002400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363773592).

222002400 is an abundant number, since it is smaller than the sum of its proper divisors (505544784).

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

222002400 is a wasteful number, since it uses less digits than its factorization.

222002400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 222002400 is about 14899.7449642603. The cubic root of 222002400 is about 605.5070766429.

Adding to 222002400 its reverse (4200222), we get a palindrome (226202622).

The spelling of 222002400 in words is "two hundred twenty-two million, two thousand, four hundred".