78368705 has 12 divisors (see below), whose sum is σ = 98312340. Its totient is φ = 59967072.

The previous prime is 78368699. The next prime is 78368723. The reversal of 78368705 is 50786387.

It can be written as a sum of positive squares in 2 ways, for example, as 51825601 + 26543104 = 7199^2 + 5152^2 .

It is not a de Polignac number, because 78368705 - 2¹² = 78364609 is a prime.

It is a super-2 number, since 2×78368705² = 12283307846754050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12170 + ... + 17459.

It is an arithmetic number, because the mean of its divisors is an integer number (8192695).

Almost surely, 2^78368705 is an apocalyptic number.

It is an amenable number.

78368705 is a deficient number, since it is larger than the sum of its proper divisors (19943635).

78368705 is a wasteful number, since it uses less digits than its factorization.

78368705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29680 (or 29657 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 78368705 is about 8852.6100670932. The cubic root of 78368705 is about 427.9380369290.

The spelling of 78368705 in words is "seventy-eight million, three hundred sixty-eight thousand, seven hundred five".