78067845 has 12 divisors (see below), whose sum is σ = 135317676. Its totient is φ = 41636160.

The previous prime is 78067841. The next prime is 78067867. The reversal of 78067845 is 54876087.

It can be written as a sum of positive squares in 2 ways, for example, as 49999041 + 28068804 = 7071^2 + 5298^2 .

It is not a de Polignac number, because 78067845 - 2² = 78067841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1734841 = 78067845 / (7 + 8 + 0 + 6 + 7 + 8 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78067845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78067841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867376 + ... + 867465.

It is an arithmetic number, because the mean of its divisors is an integer number (11276473).

Almost surely, 2^78067845 is an apocalyptic number.

It is an amenable number.

78067845 is a deficient number, since it is larger than the sum of its proper divisors (57249831).

78067845 is a wasteful number, since it uses less digits than its factorization.

78067845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734852 (or 1734849 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 78067845 is about 8835.6009982344. The cubic root of 78067845 is about 427.3897119829.

It can be divided in two parts, 7806 and 7845, that added together give a palindrome (15651).

The spelling of 78067845 in words is "seventy-eight million, sixty-seven thousand, eight hundred forty-five".