84636818 has 12 divisors (see below), whose sum is σ = 147682782. Its totient is φ = 36272880.

The previous prime is 84636817. The next prime is 84636847. The reversal of 84636818 is 81863648.

It can be written as a sum of positive squares in only one way, i.e., 76440049 + 8196769 = 8743^2 + 2863^2 .

It is a super-2 number, since 2×84636818² = 14326781922330248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (84636817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431723 + ... + 431918.

Almost surely, 2^84636818 is an apocalyptic number.

84636818 is a deficient number, since it is larger than the sum of its proper divisors (63045964).

84636818 is a wasteful number, since it uses less digits than its factorization.

84636818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863657 (or 863650 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 84636818 is about 9199.8270635920. The cubic root of 84636818 is about 439.0558577610.

The spelling of 84636818 in words is "eighty-four million, six hundred thirty-six thousand, eight hundred eighteen".