222402440 has 64 divisors (see below), whose sum is σ = 541719360. Its totient is φ = 81688320.

The previous prime is 222402437. The next prime is 222402451. The reversal of 222402440 is 44204222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108707 + ... + 110733.

It is an arithmetic number, because the mean of its divisors is an integer number (8464365).

Almost surely, 2^222402440 is an apocalyptic number.

222402440 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 222402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270859680).

222402440 is an abundant number, since it is smaller than the sum of its proper divisors (319316920).

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

222402440 is a wasteful number, since it uses less digits than its factorization.

222402440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262 (or 2258 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 222402440 is about 14913.1633129930. The cubic root of 222402440 is about 605.8705587520.

Adding to 222402440 its reverse (44204222), we get a palindrome (266606662).

The spelling of 222402440 in words is "two hundred twenty-two million, four hundred two thousand, four hundred forty".