422780 has 12 divisors (see below), whose sum is σ = 887880. Its totient is φ = 169104.

The previous prime is 422761. The next prime is 422789. The reversal of 422780 is 87224.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422789) by changing a digit.

422780 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 3 ways as a sum of consecutive naturals, for example, 10550 + ... + 10589.

It is an arithmetic number, because the mean of its divisors is an integer number (73990).

2⁴²²⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

422780 is an abundant number, since it is smaller than the sum of its proper divisors (465100).

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

422780 is a wasteful number, since it uses less digits than its factorization.

422780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148 (or 21146 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 422780 is about 650.2153489422. The cubic root of 422780 is about 75.0535913268.

The spelling of 422780 in words is "four hundred twenty-two thousand, seven hundred eighty".