30152172 has 48 divisors (see below), whose sum is σ = 74172672. Its totient is φ = 9514560.

The previous prime is 30152147. The next prime is 30152189. The reversal of 30152172 is 27125103.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29022 + ... + 30042.

It is an arithmetic number, because the mean of its divisors is an integer number (1545264).

Almost surely, 2^30152172 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 30152172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37086336).

30152172 is an abundant number, since it is smaller than the sum of its proper divisors (44020500).

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

30152172 is a wasteful number, since it uses less digits than its factorization.

30152172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 30152172 is about 5491.0993434831. The cubic root of 30152172 is about 311.2477356652.

Adding to 30152172 its reverse (27125103), we get a palindrome (57277275).

The spelling of 30152172 in words is "thirty million, one hundred fifty-two thousand, one hundred seventy-two".