47909818 has 16 divisors (see below), whose sum is σ = 80928000. Its totient is φ = 21074400.

The previous prime is 47909803. The next prime is 47909831. The reversal of 47909818 is 81890974.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34443 + ... + 35806.

It is an arithmetic number, because the mean of its divisors is an integer number (5058000).

Almost surely, 2^47909818 is an apocalyptic number.

47909818 is a deficient number, since it is larger than the sum of its proper divisors (33018182).

47909818 is a wasteful number, since it uses less digits than its factorization.

47909818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70293.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 47909818 is about 6921.6918452066. The cubic root of 47909818 is about 363.1963764784.

The spelling of 47909818 in words is "forty-seven million, nine hundred nine thousand, eight hundred eighteen".