422628 has 24 divisors (see below), whose sum is σ = 1011360. Its totient is φ = 137280.

The previous prime is 422627. The next prime is 422657. The reversal of 422628 is 826224.

422628 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×422628² = 357228852768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 422598 and 422607.

It is not an unprimeable number, because it can be changed into a prime (422621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63 + ... + 921.

It is an arithmetic number, because the mean of its divisors is an integer number (42140).

2⁴²²⁶²⁸ is an apocalyptic number.

It is an amenable number.

422628 is an abundant number, since it is smaller than the sum of its proper divisors (588732).

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

422628 is a wasteful number, since it uses less digits than its factorization.

422628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 905 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 422628 is about 650.0984540821. The cubic root of 422628 is about 75.0445956999.

The spelling of 422628 in words is "four hundred twenty-two thousand, six hundred twenty-eight".