30109872 has 80 divisors (see below), whose sum is σ = 85043168. Its totient is φ = 9123840.

The previous prime is 30109861. The next prime is 30109903. The reversal of 30109872 is 27890103.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

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, 45222 + ... + 45882.

Almost surely, 2^30109872 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 30109872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42521584).

30109872 is an abundant number, since it is smaller than the sum of its proper divisors (54933296).

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

30109872 is a wasteful number, since it uses less digits than its factorization.

30109872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 30109872 is about 5487.2463039306. The cubic root of 30109872 is about 311.1021193924.

Adding to 30109872 its reverse (27890103), we get a palindrome (57999975).

The spelling of 30109872 in words is "thirty million, one hundred nine thousand, eight hundred seventy-two".