78860785 has 4 divisors (see below), whose sum is σ = 94632948. Its totient is φ = 63088624.

The previous prime is 78860713. The next prime is 78860797. The reversal of 78860785 is 58706887.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43612816 + 35247969 = 6604^2 + 5937^2 .

It is a cyclic number.

It is not a de Polignac number, because 78860785 - 2¹¹ = 78858737 is a prime.

It is a Duffinian 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, 7886074 + ... + 7886083.

It is an arithmetic number, because the mean of its divisors is an integer number (23658237).

Almost surely, 2^78860785 is an apocalyptic number.

It is an amenable number.

78860785 is a deficient number, since it is larger than the sum of its proper divisors (15772163).

78860785 is a wasteful number, since it uses less digits than its factorization.

78860785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772162.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 78860785 is about 8880.3595084884. The cubic root of 78860785 is about 428.8318483651.

The spelling of 78860785 in words is "seventy-eight million, eight hundred sixty thousand, seven hundred eighty-five".