222000778 has 8 divisors (see below), whose sum is σ = 333457668. Its totient is φ = 110848224.

The previous prime is 222000763. The next prime is 222000791. The reversal of 222000778 is 877000222.

It can be written as a sum of positive squares in 2 ways, for example, as 216178209 + 5822569 = 14703^2 + 2413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74251 + ... + 77182.

Almost surely, 2^222000778 is an apocalyptic number.

222000778 is a deficient number, since it is larger than the sum of its proper divisors (111456890).

222000778 is a wasteful number, since it uses less digits than its factorization.

222000778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152168.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 222000778 is about 14899.6905336990. The cubic root of 222000778 is about 605.5056019818.

It can be divided in two parts, 222000 and 778, that added together give a triangular number (222778 = T₆₆₇).

The spelling of 222000778 in words is "two hundred twenty-two million, seven hundred seventy-eight", and thus it is an aban number.