84399866 has 8 divisors (see below), whose sum is σ = 134046900. Its totient is φ = 39717568.

The previous prime is 84399859. The next prime is 84399869. The reversal of 84399866 is 66899348.

It can be written as a sum of positive squares in 2 ways, for example, as 70073641 + 14326225 = 8371^2 + 3785^2 .

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

It is not an unprimeable number, because it can be changed into a prime (84399869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241141 + ... + 1241208.

Almost surely, 2^84399866 is an apocalyptic number.

84399866 is a deficient number, since it is larger than the sum of its proper divisors (49647034).

84399866 is a wasteful number, since it uses less digits than its factorization.

84399866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482368.

The product of its digits is 2239488, while the sum is 53.

The square root of 84399866 is about 9186.9399693260. The cubic root of 84399866 is about 438.6457430926.

The spelling of 84399866 in words is "eighty-four million, three hundred ninety-nine thousand, eight hundred sixty-six".