84397864 has 16 divisors (see below), whose sum is σ = 158361300. Its totient is φ = 42168192.

The previous prime is 84397849. The next prime is 84397883. The reversal of 84397864 is 46879348.

It can be written as a sum of positive squares in 2 ways, for example, as 63329764 + 21068100 = 7958^2 + 4590^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11364 + ... + 17260.

Almost surely, 2^84397864 is an apocalyptic number.

It is an amenable number.

84397864 is a deficient number, since it is larger than the sum of its proper divisors (73963436).

84397864 is a wasteful number, since it uses less digits than its factorization.

84397864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692 (or 7688 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 84397864 is about 9186.8310096572. The cubic root of 84397864 is about 438.6422747786.

The spelling of 84397864 in words is "eighty-four million, three hundred ninety-seven thousand, eight hundred sixty-four".