78547312 has 20 divisors (see below), whose sum is σ = 157434120. Its totient is φ = 37919168.

The previous prime is 78547307. The next prime is 78547319. The reversal of 78547312 is 21374587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78547319) 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, 84178 + ... + 85105.

It is an arithmetic number, because the mean of its divisors is an integer number (7871706).

Almost surely, 2^78547312 is an apocalyptic number.

It is an amenable number.

78547312 is an abundant number, since it is smaller than the sum of its proper divisors (78886808).

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

78547312 is a wasteful number, since it uses less digits than its factorization.

78547312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169320 (or 169314 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 78547312 is about 8862.6921417818. The cubic root of 78547312 is about 428.2628891237.

The spelling of 78547312 in words is "seventy-eight million, five hundred forty-seven thousand, three hundred twelve".