47217856 has 28 divisors (see below), whose sum is σ = 107084368. Its totient is φ = 20236032.

The previous prime is 47217847. The next prime is 47217871. The reversal of 47217856 is 65871274.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52251 + ... + 53146.

Almost surely, 2^47217856 is an apocalyptic number.

It is an amenable number.

47217856 is an abundant number, since it is smaller than the sum of its proper divisors (59866512).

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

47217856 is a wasteful number, since it uses less digits than its factorization.

47217856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105416 (or 105406 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The square root of 47217856 is about 6871.5250126882. The cubic root of 47217856 is about 361.4393404861.

The spelling of 47217856 in words is "forty-seven million, two hundred seventeen thousand, eight hundred fifty-six".