422778 has 16 divisors (see below), whose sum is σ = 873216. Its totient is φ = 136320.

The previous prime is 422761. The next prime is 422789. The reversal of 422778 is 877224.

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, 951 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (54576).

2⁴²²⁷⁷⁸ is an apocalyptic number.

422778 is an abundant number, since it is smaller than the sum of its proper divisors (450438).

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

422778 is a wasteful number, since it uses less digits than its factorization.

422778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309.

The product of its digits is 6272, while the sum is 30.

The square root of 422778 is about 650.2138109884. The cubic root of 422778 is about 75.0534729773.

The spelling of 422778 in words is "four hundred twenty-two thousand, seven hundred seventy-eight".