900022 has 4 divisors (see below), whose sum is σ = 1350036. Its totient is φ = 450010.

The previous prime is 900019. The next prime is 900037. The reversal of 900022 is 220009.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 8.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 899975 and 900011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225004 + ... + 225007.

It is an arithmetic number, because the mean of its divisors is an integer number (337509).

2⁹⁰⁰⁰²² is an apocalyptic number.

900022 is a deficient number, since it is larger than the sum of its proper divisors (450014).

900022 is a wasteful number, since it uses less digits than its factorization.

900022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450013.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 900022 is about 948.6948929977. The cubic root of 900022 is about 96.5497251492.

Subtracting from 900022 its sum of digits (13), we obtain a palindrome (900009).

The spelling of 900022 in words is "nine hundred thousand, twenty-two".