222671778 has 24 divisors (see below), whose sum is σ = 518053392. Its totient is φ = 63620424.

The previous prime is 222671741. The next prime is 222671803. The reversal of 222671778 is 877176222.

222671778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378400 + ... + 378987.

It is an arithmetic number, because the mean of its divisors is an integer number (21585558).

Almost surely, 2^222671778 is an apocalyptic number.

222671778 is an abundant number, since it is smaller than the sum of its proper divisors (295381614).

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

222671778 is a wasteful number, since it uses less digits than its factorization.

222671778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757406 (or 757399 counting only the distinct ones).

The product of its digits is 131712, while the sum is 42.

The square root of 222671778 is about 14922.1907908993. The cubic root of 222671778 is about 606.1150376866.

The spelling of 222671778 in words is "two hundred twenty-two million, six hundred seventy-one thousand, seven hundred seventy-eight".