78965787 has 16 divisors (see below), whose sum is σ = 106400000. Its totient is φ = 52091424.

The previous prime is 78965741. The next prime is 78965801. The reversal of 78965787 is 78756987.

It is not a de Polignac number, because 78965787 - 2⁸ = 78965531 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78965717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208164 + ... + 208542.

It is an arithmetic number, because the mean of its divisors is an integer number (6650000).

Almost surely, 2^78965787 is an apocalyptic number.

78965787 is a deficient number, since it is larger than the sum of its proper divisors (27434213).

78965787 is a wasteful number, since it uses less digits than its factorization.

78965787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930.

The product of its digits is 5927040, while the sum is 57.

The square root of 78965787 is about 8886.2695772748. The cubic root of 78965787 is about 429.0220917656.

The spelling of 78965787 in words is "seventy-eight million, nine hundred sixty-five thousand, seven hundred eighty-seven".