47138 has 24 divisors (see below), whose sum is σ = 90972. Its totient is φ = 18144.

The previous prime is 47137. The next prime is 47143. The reversal of 47138 is 83174.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47089 + 49 = 217^2 + 7^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (47137) 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, 1256 + ... + 1292.

2⁴⁷¹³⁸ is an apocalyptic number.

47138 is a deficient number, since it is larger than the sum of its proper divisors (43834).

47138 is a wasteful number, since it uses less digits than its factorization.

47138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 59 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 47138 is about 217.1128738698. The cubic root of 47138 is about 36.1235467142.

The spelling of 47138 in words is "forty-seven thousand, one hundred thirty-eight".