47189864 has 8 divisors (see below), whose sum is σ = 88481010. Its totient is φ = 23594928.

The previous prime is 47189861. The next prime is 47189869. The reversal of 47189864 is 46898174.

It can be written as a sum of positive squares in only one way, i.e., 46104100 + 1085764 = 6790^2 + 1042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (47189861) 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 as a sum of consecutive naturals, namely, 2949359 + ... + 2949374.

Almost surely, 2^47189864 is an apocalyptic number.

It is an amenable number.

47189864 is a deficient number, since it is larger than the sum of its proper divisors (41291146).

47189864 is a wasteful number, since it uses less digits than its factorization.

47189864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898739 (or 5898735 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 47189864 is about 6869.4878993998. The cubic root of 47189864 is about 361.3679027517.

The spelling of 47189864 in words is "forty-seven million, one hundred eighty-nine thousand, eight hundred sixty-four".