47919138 has 16 divisors (see below), whose sum is σ = 96529440. Its totient is φ = 15857856.

The previous prime is 47919127. The next prime is 47919139. The reversal of 47919138 is 83191974.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 47919138.

It is not an unprimeable number, because it can be changed into a prime (47919139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27895 + ... + 29562.

It is an arithmetic number, because the mean of its divisors is an integer number (6033090).

Almost surely, 2^47919138 is an apocalyptic number.

47919138 is an abundant number, since it is smaller than the sum of its proper divisors (48610302).

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

47919138 is a wasteful number, since it uses less digits than its factorization.

47919138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57601.

The product of its digits is 54432, while the sum is 42.

The square root of 47919138 is about 6922.3650582731. The cubic root of 47919138 is about 363.2199260756.

The spelling of 47919138 in words is "forty-seven million, nine hundred nineteen thousand, one hundred thirty-eight".