47990866 has 32 divisors (see below), whose sum is σ = 90149760. Its totient is φ = 18614400.

The previous prime is 47990863. The next prime is 47990909. The reversal of 47990866 is 66809974.

It is not an unprimeable number, because it can be changed into a prime (47990861) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 42720 + ... + 43828.

It is an arithmetic number, because the mean of its divisors is an integer number (2817180).

Almost surely, 2^47990866 is an apocalyptic number.

47990866 is a deficient number, since it is larger than the sum of its proper divisors (42158894).

47990866 is a wasteful number, since it uses less digits than its factorization.

47990866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 47990866 is about 6927.5440092431. The cubic root of 47990866 is about 363.4010649103.

It can be divided in two parts, 479908 and 66, that added together give a palindrome (479974).

The spelling of 47990866 in words is "forty-seven million, nine hundred ninety thousand, eight hundred sixty-six".