47994138 has 24 divisors (see below), whose sum is σ = 107342976. Its totient is φ = 15481800.

The previous prime is 47994137. The next prime is 47994161. The reversal of 47994138 is 83149974.

47994138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 47994093 and 47994102.

It is not an unprimeable number, because it can be changed into a prime (47994137) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 42448 + ... + 43563.

It is an arithmetic number, because the mean of its divisors is an integer number (4472624).

Almost surely, 2^47994138 is an apocalyptic number.

47994138 is an abundant number, since it is smaller than the sum of its proper divisors (59348838).

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

47994138 is a wasteful number, since it uses less digits than its factorization.

47994138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86050 (or 86047 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 47994138 is about 6927.7801639486. The cubic root of 47994138 is about 363.4093235740.

The spelling of 47994138 in words is "forty-seven million, nine hundred ninety-four thousand, one hundred thirty-eight".