47851638 has 16 divisors (see below), whose sum is σ = 99864576. Its totient is φ = 15257000.

The previous prime is 47851613. The next prime is 47851673. The reversal of 47851638 is 83615874.

47851638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 47851638.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 173238 + ... + 173513.

It is an arithmetic number, because the mean of its divisors is an integer number (6241536).

Almost surely, 2^47851638 is an apocalyptic number.

47851638 is an abundant number, since it is smaller than the sum of its proper divisors (52012938).

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

47851638 is a wasteful number, since it uses less digits than its factorization.

47851638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346779.

The product of its digits is 161280, while the sum is 42.

The square root of 47851638 is about 6917.4878388039. The cubic root of 47851638 is about 363.0492992868.

The spelling of 47851638 in words is "forty-seven million, eight hundred fifty-one thousand, six hundred thirty-eight".