78612318 has 24 divisors (see below), whose sum is σ = 180346608. Its totient is φ = 24662592.

The previous prime is 78612283. The next prime is 78612319. The reversal of 78612318 is 81321687.

78612318 is a `hidden beast` number, since 7 + 8 + 612 + 31 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78612319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128146 + ... + 128757.

It is an arithmetic number, because the mean of its divisors is an integer number (7514442).

Almost surely, 2^78612318 is an apocalyptic number.

78612318 is an abundant number, since it is smaller than the sum of its proper divisors (101734290).

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

78612318 is a wasteful number, since it uses less digits than its factorization.

78612318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256928 (or 256925 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 78612318 is about 8866.3587791156. The cubic root of 78612318 is about 428.3810004468.

The spelling of 78612318 in words is "seventy-eight million, six hundred twelve thousand, three hundred eighteen".