628422 has 32 divisors (see below), whose sum is σ = 1365984. Its totient is φ = 192000.

The previous prime is 628399. The next prime is 628423. The reversal of 628422 is 224826.

628422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×628422³ = 744518333188222344, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 628392 and 628401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628423) by changing a digit.

628422 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 15 ways as a sum of consecutive naturals, for example, 6172 + ... + 6272.

It is an arithmetic number, because the mean of its divisors is an integer number (42687).

2⁶²⁸⁴²² is an apocalyptic number.

628422 is an abundant number, since it is smaller than the sum of its proper divisors (737562).

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

628422 is a wasteful number, since it uses less digits than its factorization.

628422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184.

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

The square root of 628422 is about 792.7307235121. The cubic root of 628422 is about 85.6545544168.

The spelling of 628422 in words is "six hundred twenty-eight thousand, four hundred twenty-two".