30423222 has 32 divisors (see below), whose sum is σ = 67829760. Its totient is φ = 10107720.

The previous prime is 30423191. The next prime is 30423229. The reversal of 30423222 is 22232403.

It is a super-2 number, since 2×30423222² = 1851144873722568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30423195 and 30423204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30423229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19947 + ... + 21417.

It is an arithmetic number, because the mean of its divisors is an integer number (2119680).

Almost surely, 2^30423222 is an apocalyptic number.

30423222 is an abundant number, since it is smaller than the sum of its proper divisors (37406538).

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

30423222 is a wasteful number, since it uses less digits than its factorization.

30423222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 30423222 is about 5515.7249750146. The cubic root of 30423222 is about 312.1775985912.

Adding to 30423222 its reverse (22232403), we get a palindrome (52655625).

The spelling of 30423222 in words is "thirty million, four hundred twenty-three thousand, two hundred twenty-two".