47838161 has 12 divisors (see below), whose sum is σ = 55832868. Its totient is φ = 40868352.

The previous prime is 47838149. The next prime is 47838163. The reversal of 47838161 is 16183874.

It can be written as a sum of positive squares in 2 ways, for example, as 8850625 + 38987536 = 2975^2 + 6244^2 .

It is not a de Polignac number, because 47838161 - 2¹⁰ = 47837137 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (47838163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15065 + ... + 17961.

It is an arithmetic number, because the mean of its divisors is an integer number (4652739).

Almost surely, 2^47838161 is an apocalyptic number.

It is an amenable number.

47838161 is a deficient number, since it is larger than the sum of its proper divisors (7994707).

47838161 is a wasteful number, since it uses less digits than its factorization.

47838161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248 (or 3241 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 47838161 is about 6916.5136448936. The cubic root of 47838161 is about 363.0152128547.

The spelling of 47838161 in words is "forty-seven million, eight hundred thirty-eight thousand, one hundred sixty-one".