30442236 has 48 divisors (see below), whose sum is σ = 77927808. Its totient is φ = 9172800.

The previous prime is 30442219. The next prime is 30442259. The reversal of 30442236 is 63224403.

It is a happy number.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27306 + ... + 28398.

It is an arithmetic number, because the mean of its divisors is an integer number (1623496).

Almost surely, 2^30442236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30442236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38963904).

30442236 is an abundant number, since it is smaller than the sum of its proper divisors (47485572).

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

30442236 is a wasteful number, since it uses less digits than its factorization.

30442236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 30442236 is about 5517.4483232741. The cubic root of 30442236 is about 312.2426202897.

Adding to 30442236 its reverse (63224403), we get a palindrome (93666639).

The spelling of 30442236 in words is "thirty million, four hundred forty-two thousand, two hundred thirty-six".