222578868 has 24 divisors (see below), whose sum is σ = 519922368. Its totient is φ = 74111296.

The previous prime is 222578861. The next prime is 222578869. The reversal of 222578868 is 868875222.

It is a super-2 number, since 2×222578868² = 99082704960322848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222578861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705 + ... + 21167.

It is an arithmetic number, because the mean of its divisors is an integer number (21663432).

Almost surely, 2^222578868 is an apocalyptic number.

It is an amenable number.

222578868 is an abundant number, since it is smaller than the sum of its proper divisors (297343500).

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

222578868 is a wasteful number, since it uses less digits than its factorization.

222578868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20423 (or 20421 counting only the distinct ones).

The product of its digits is 860160, while the sum is 48.

The square root of 222578868 is about 14919.0773173142. The cubic root of 222578868 is about 606.0307252772.

It can be divided in two parts, 222578 and 868, that added together give a triangular number (223446 = T₆₆₈).

The spelling of 222578868 in words is "two hundred twenty-two million, five hundred seventy-eight thousand, eight hundred sixty-eight".