422890 has 16 divisors (see below), whose sum is σ = 820008. Its totient is φ = 156096.

The previous prime is 422881. The next prime is 422893. The reversal of 422890 is 98224.

It can be written as a sum of positive squares in 4 ways, for example, as 385641 + 37249 = 621^2 + 193^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (422893) 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, 1497 + ... + 1756.

2⁴²²⁸⁹⁰ is an apocalyptic number.

422890 is a deficient number, since it is larger than the sum of its proper divisors (397118).

422890 is a wasteful number, since it uses less digits than its factorization.

422890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 422890 is about 650.2999308012. The cubic root of 422890 is about 75.0600999752.

The spelling of 422890 in words is "four hundred twenty-two thousand, eight hundred ninety".