78473684 has 12 divisors (see below), whose sum is σ = 137551008. Its totient is φ = 39173400.

The previous prime is 78473663. The next prime is 78473699. The reversal of 78473684 is 48637487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13022 + ... + 18069.

It is an arithmetic number, because the mean of its divisors is an integer number (11462584).

Almost surely, 2^78473684 is an apocalyptic number.

It is an amenable number.

78473684 is a deficient number, since it is larger than the sum of its proper divisors (59077324).

78473684 is a wasteful number, since it uses less digits than its factorization.

78473684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31726 (or 31724 counting only the distinct ones).

The product of its digits is 903168, while the sum is 47.

The square root of 78473684 is about 8858.5373510529. The cubic root of 78473684 is about 428.1290335031.

The spelling of 78473684 in words is "seventy-eight million, four hundred seventy-three thousand, six hundred eighty-four".