685422 has 20 divisors (see below), whose sum is σ = 1536216. Its totient is φ = 228420.

The previous prime is 685417. The next prime is 685427. The reversal of 685422 is 224586.

It is an interprime number because it is at equal distance from previous prime (685417) and next prime (685427).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685427) by changing a digit.

685422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1954 + ... + 2277.

2⁶⁸⁵⁴²² is an apocalyptic number.

685422 is an abundant number, since it is smaller than the sum of its proper divisors (850794).

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

685422 is a wasteful number, since it uses less digits than its factorization.

685422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4245 (or 4236 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 685422 is about 827.9021681334. The cubic root of 685422 is about 88.1696966562.

The spelling of 685422 in words is "six hundred eighty-five thousand, four hundred twenty-two".