84078684 has 18 divisors (see below), whose sum is σ = 212532320. Its totient is φ = 28026216.

The previous prime is 84078619. The next prime is 84078703. The reversal of 84078684 is 48687048.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 1167724 + ... + 1167795.

Almost surely, 2^84078684 is an apocalyptic number.

It is an amenable number.

84078684 is an abundant number, since it is smaller than the sum of its proper divisors (128453636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84078684 is a wasteful number, since it uses less digits than its factorization.

84078684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335529 (or 2335524 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 84078684 is about 9169.4429492745. The cubic root of 84078684 is about 438.0886165853.

It can be divided in two parts, 840 and 78684, that added together give a square (79524 = 282²).

The spelling of 84078684 in words is "eighty-four million, seventy-eight thousand, six hundred eighty-four".