47309172 has 24 divisors (see below), whose sum is σ = 110971392. Its totient is φ = 15686400.

The previous prime is 47309153. The next prime is 47309189. The reversal of 47309172 is 27190374.

47309172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 8029 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (4623808).

Almost surely, 2^47309172 is an apocalyptic number.

It is an amenable number.

47309172 is an abundant number, since it is smaller than the sum of its proper divisors (63662220).

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

47309172 is a wasteful number, since it uses less digits than its factorization.

47309172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20839 (or 20837 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 47309172 is about 6878.1663254097. The cubic root of 47309172 is about 361.6721898350.

The spelling of 47309172 in words is "forty-seven million, three hundred nine thousand, one hundred seventy-two".