785872889 has 16 divisors (see below), whose sum is σ = 877121280. Its totient is φ = 699736320.

The previous prime is 785872883. The next prime is 785872891. The reversal of 785872889 is 988278587.

It is a happy number.

It is not a de Polignac number, because 785872889 - 2⁴ = 785872873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785872883) 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, 328592 + ... + 330974.

It is an arithmetic number, because the mean of its divisors is an integer number (54820080).

Almost surely, 2^785872889 is an apocalyptic number.

It is an amenable number.

785872889 is a deficient number, since it is larger than the sum of its proper divisors (91248391).

785872889 is a wasteful number, since it uses less digits than its factorization.

785872889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440.

The product of its digits is 18063360, while the sum is 62.

The square root of 785872889 is about 28033.4244964828. The cubic root of 785872889 is about 922.8209292144.

The spelling of 785872889 in words is "seven hundred eighty-five million, eight hundred seventy-two thousand, eight hundred eighty-nine".