47720866 has 8 divisors (see below), whose sum is σ = 71653824. Its totient is φ = 23836260.

The previous prime is 47720851. The next prime is 47720909. The reversal of 47720866 is 66802774.

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

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, 9510 + ... + 13633.

It is an arithmetic number, because the mean of its divisors is an integer number (8956728).

Almost surely, 2^47720866 is an apocalyptic number.

47720866 is a deficient number, since it is larger than the sum of its proper divisors (23932958).

47720866 is a wasteful number, since it uses less digits than its factorization.

47720866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24176.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 47720866 is about 6908.0290966382. The cubic root of 47720866 is about 362.7182761506.

The spelling of 47720866 in words is "forty-seven million, seven hundred twenty thousand, eight hundred sixty-six".