30072942 has 48 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 9487296.

The previous prime is 30072929. The next prime is 30072943. The reversal of 30072942 is 24927003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30072943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27123 + ... + 28209.

It is an arithmetic number, because the mean of its divisors is an integer number (1432080).

Almost surely, 2^30072942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30072942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34369920).

30072942 is an abundant number, since it is smaller than the sum of its proper divisors (38666898).

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

30072942 is a wasteful number, since it uses less digits than its factorization.

30072942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30072942 is about 5483.8801956279. The cubic root of 30072942 is about 310.9748776073.

Adding to 30072942 its reverse (24927003), we get a palindrome (54999945).

The spelling of 30072942 in words is "thirty million, seventy-two thousand, nine hundred forty-two".