30420234 has 48 divisors (see below), whose sum is σ = 72019584. Its totient is φ = 9223200.

The previous prime is 30420227. The next prime is 30420239. The reversal of 30420234 is 43202403.

It is a super-2 number, since 2×30420234² = 1850781273229512, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15699 + ... + 17529.

It is an arithmetic number, because the mean of its divisors is an integer number (1500408).

Almost surely, 2^30420234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30420234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36009792).

30420234 is an abundant number, since it is smaller than the sum of its proper divisors (41599350).

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

30420234 is a wasteful number, since it uses less digits than its factorization.

30420234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923 (or 1920 counting only the distinct ones).

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

The square root of 30420234 is about 5515.4541064177. The cubic root of 30420234 is about 312.1673781396.

Adding to 30420234 its reverse (43202403), we get a palindrome (73622637).

The spelling of 30420234 in words is "thirty million, four hundred twenty thousand, two hundred thirty-four".