84686864 has 20 divisors (see below), whose sum is σ = 164243580. Its totient is φ = 42301440.

The previous prime is 84686863. The next prime is 84686881. The reversal of 84686864 is 46868648.

It can be written as a sum of positive squares in 2 ways, for example, as 36966400 + 47720464 = 6080^2 + 6908^2 .

It is not an unprimeable number, because it can be changed into a prime (84686863) 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, 19832 + ... + 23720.

It is an arithmetic number, because the mean of its divisors is an integer number (8212179).

Almost surely, 2^84686864 is an apocalyptic number.

It is an amenable number.

84686864 is a deficient number, since it is larger than the sum of its proper divisors (79556716).

84686864 is a wasteful number, since it uses less digits than its factorization.

84686864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258 (or 5252 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 50.

The square root of 84686864 is about 9202.5466040656. The cubic root of 84686864 is about 439.1423790508.

The spelling of 84686864 in words is "eighty-four million, six hundred eighty-six thousand, eight hundred sixty-four".