222662420 has 24 divisors (see below), whose sum is σ = 469199304. Its totient is φ = 88758656.

The previous prime is 222662327. The next prime is 222662423. The reversal of 222662420 is 24266222.

It can be written as a sum of positive squares in 4 ways, for example, as 134977924 + 87684496 = 11618^2 + 9364^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 222662420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222662423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13139 + ... + 24858.

It is an arithmetic number, because the mean of its divisors is an integer number (19549971).

Almost surely, 2^222662420 is an apocalyptic number.

222662420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222662420 is an abundant number, since it is smaller than the sum of its proper divisors (246536884).

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

222662420 is a wasteful number, since it uses less digits than its factorization.

222662420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38299 (or 38297 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 222662420 is about 14921.8772277485. The cubic root of 222662420 is about 606.1065467079.

It can be divided in two parts, 2226 and 62420, that added together give a palindrome (64646).

The spelling of 222662420 in words is "two hundred twenty-two million, six hundred sixty-two thousand, four hundred twenty".