78839585 has 16 divisors (see below), whose sum is σ = 103386240. Its totient is φ = 57239040.

The previous prime is 78839573. The next prime is 78839587. The reversal of 78839585 is 58593887.

It is not a de Polignac number, because 78839585 - 2⁸ = 78839329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78839587) 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, 50324 + ... + 51866.

It is an arithmetic number, because the mean of its divisors is an integer number (6461640).

Almost surely, 2^78839585 is an apocalyptic number.

It is an amenable number.

78839585 is a deficient number, since it is larger than the sum of its proper divisors (24546655).

78839585 is a wasteful number, since it uses less digits than its factorization.

78839585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488.

The product of its digits is 2419200, while the sum is 53.

The square root of 78839585 is about 8879.1657828875. The cubic root of 78839585 is about 428.7934175617.

The spelling of 78839585 in words is "seventy-eight million, eight hundred thirty-nine thousand, five hundred eighty-five".