47391808 has 28 divisors (see below), whose sum is σ = 97080832. Its totient is φ = 22930560.

The previous prime is 47391797. The next prime is 47391821. The reversal of 47391808 is 80819374.

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, 9960 + ... + 13927.

Almost surely, 2^47391808 is an apocalyptic number.

It is an amenable number.

47391808 is an abundant number, since it is smaller than the sum of its proper divisors (49689024).

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

47391808 is a wasteful number, since it uses less digits than its factorization.

47391808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23930 (or 23920 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 47391808 is about 6884.1708287927. The cubic root of 47391808 is about 361.8826476748.

The spelling of 47391808 in words is "forty-seven million, three hundred ninety-one thousand, eight hundred eight".