47820138 has 8 divisors (see below), whose sum is σ = 95640288. Its totient is φ = 15940044.

The previous prime is 47820107. The next prime is 47820163. The reversal of 47820138 is 83102874.

It is a sphenic number, since it is the product of 3 distinct primes.

47820138 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 47820099 and 47820108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3985006 + ... + 3985017.

It is an arithmetic number, because the mean of its divisors is an integer number (11955036).

Almost surely, 2^47820138 is an apocalyptic number.

47820138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

47820138 is a wasteful number, since it uses less digits than its factorization.

47820138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970028.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 47820138 is about 6915.2106258595. The cubic root of 47820138 is about 362.9696185366.

The spelling of 47820138 in words is "forty-seven million, eight hundred twenty thousand, one hundred thirty-eight".