78457308 has 24 divisors (see below), whose sum is σ = 192702720. Its totient is φ = 24775920.

The previous prime is 78457283. The next prime is 78457321. The reversal of 78457308 is 80375487.

It is a self number, because there is not a number n which added to its sum of digits gives 78457308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171828 + ... + 172283.

It is an arithmetic number, because the mean of its divisors is an integer number (8029280).

Almost surely, 2^78457308 is an apocalyptic number.

It is an amenable number.

78457308 is an abundant number, since it is smaller than the sum of its proper divisors (114245412).

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

78457308 is a wasteful number, since it uses less digits than its factorization.

78457308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344137 (or 344135 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 78457308 is about 8857.6129967390. The cubic root of 78457308 is about 428.0992505727.

The spelling of 78457308 in words is "seventy-eight million, four hundred fifty-seven thousand, three hundred eight".