78004689 has 16 divisors (see below), whose sum is σ = 119011200. Its totient is φ = 44519040.

The previous prime is 78004627. The next prime is 78004697. The reversal of 78004689 is 98640087.

It is a happy number.

It is not a de Polignac number, because 78004689 - 2¹¹ = 78002641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78004689.

It is not an unprimeable number, because it can be changed into a prime (78004609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20259 + ... + 23799.

It is an arithmetic number, because the mean of its divisors is an integer number (7438200).

Almost surely, 2^78004689 is an apocalyptic number.

It is an amenable number.

78004689 is a deficient number, since it is larger than the sum of its proper divisors (41006511).

78004689 is a wasteful number, since it uses less digits than its factorization.

78004689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 78004689 is about 8832.0263246890. The cubic root of 78004689 is about 427.2744297489.

The spelling of 78004689 in words is "seventy-eight million, four thousand, six hundred eighty-nine".