47728171 has 24 divisors (see below), whose sum is σ = 53766720. Its totient is φ = 42287616.

The previous prime is 47728159. The next prime is 47728181. The reversal of 47728171 is 17182774.

It is not a de Polignac number, because 47728171 - 2¹³ = 47719979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47728171.

It is not an unprimeable number, because it can be changed into a prime (47728181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491995 + ... + 492091.

It is an arithmetic number, because the mean of its divisors is an integer number (2240280).

Almost surely, 2^47728171 is an apocalyptic number.

47728171 is a deficient number, since it is larger than the sum of its proper divisors (6038549).

47728171 is a wasteful number, since it uses less digits than its factorization.

47728171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 192 counting only the distinct ones).

The product of its digits is 21952, while the sum is 37.

The square root of 47728171 is about 6908.5578089787. The cubic root of 47728171 is about 362.7367832317.

The spelling of 47728171 in words is "forty-seven million, seven hundred twenty-eight thousand, one hundred seventy-one".