47791518 has 8 divisors (see below), whose sum is σ = 95583048. Its totient is φ = 15930504.

The previous prime is 47791501. The next prime is 47791519. The reversal of 47791518 is 81519774.

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

47791518 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 47791518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47791519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3982621 + ... + 3982632.

It is an arithmetic number, because the mean of its divisors is an integer number (11947881).

Almost surely, 2^47791518 is an apocalyptic number.

47791518 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.

47791518 is a wasteful number, since it uses less digits than its factorization.

47791518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965258.

The product of its digits is 70560, while the sum is 42.

The square root of 47791518 is about 6913.1409648582. The cubic root of 47791518 is about 362.8971925391.

The spelling of 47791518 in words is "forty-seven million, seven hundred ninety-one thousand, five hundred eighteen".