30470172 has 12 divisors (see below), whose sum is σ = 71097096. Its totient is φ = 10156720.

The previous prime is 30470161. The next prime is 30470189. The reversal of 30470172 is 27107403.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269579 + ... + 1269602.

It is an arithmetic number, because the mean of its divisors is an integer number (5924758).

Almost surely, 2^30470172 is an apocalyptic number.

It is an amenable number.

30470172 is an abundant number, since it is smaller than the sum of its proper divisors (40626924).

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

30470172 is a wasteful number, since it uses less digits than its factorization.

30470172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539188 (or 2539186 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 30470172 is about 5519.9793477875. The cubic root of 30470172 is about 312.3381032340.

Adding to 30470172 its reverse (27107403), we get a palindrome (57577575).

The spelling of 30470172 in words is "thirty million, four hundred seventy thousand, one hundred seventy-two".