857790222 has 16 divisors (see below), whose sum is σ = 1716673872. Its totient is φ = 285747840.

The previous prime is 857790209. The next prime is 857790247. The reversal of 857790222 is 222097758.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35179 + ... + 54342.

It is an arithmetic number, because the mean of its divisors is an integer number (107292117).

Almost surely, 2^857790222 is an apocalyptic number.

857790222 is an abundant number, since it is smaller than the sum of its proper divisors (858883650).

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

857790222 is a wasteful number, since it uses less digits than its factorization.

857790222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91123.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 857790222 is about 29288.0559614325. The cubic root of 857790222 is about 950.1533351757.

The spelling of 857790222 in words is "eight hundred fifty-seven million, seven hundred ninety thousand, two hundred twenty-two".