78745856 has 36 divisors (see below), whose sum is σ = 179643072. Its totient is φ = 33747456.

The previous prime is 78745847. The next prime is 78745907. The reversal of 78745856 is 65854787.

It is an alternating number because its digits alternate between odd and even.

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, 20180 + ... + 23763.

Almost surely, 2^78745856 is an apocalyptic number.

It is an amenable number.

78745856 is an abundant number, since it is smaller than the sum of its proper divisors (100897216).

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

78745856 is an equidigital number, since it uses as much as digits as its factorization.

78745856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43966 (or 43952 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 50.

The square root of 78745856 is about 8873.8861836289. The cubic root of 78745856 is about 428.6234254795.

The spelling of 78745856 in words is "seventy-eight million, seven hundred forty-five thousand, eight hundred fifty-six".