422685857 has 4 divisors (see below), whose sum is σ = 461111856. Its totient is φ = 384259860.

The previous prime is 422685847. The next prime is 422685859. The reversal of 422685857 is 758586224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 422685857 - 2¹⁴ = 422669473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422685859) 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 3 ways as a sum of consecutive naturals, for example, 19212983 + ... + 19213004.

It is an arithmetic number, because the mean of its divisors is an integer number (115277964).

Almost surely, 2^422685857 is an apocalyptic number.

It is an amenable number.

422685857 is a deficient number, since it is larger than the sum of its proper divisors (38425999).

422685857 is a wasteful number, since it uses less digits than its factorization.

422685857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38425998.

The product of its digits is 1075200, while the sum is 47.

The square root of 422685857 is about 20559.3253050775. The cubic root of 422685857 is about 750.4802003298.

The spelling of 422685857 in words is "four hundred twenty-two million, six hundred eighty-five thousand, eight hundred fifty-seven".