77898285 has 12 divisors (see below), whose sum is σ = 135023772. Its totient is φ = 41545728.

The previous prime is 77898253. The next prime is 77898299. The reversal of 77898285 is 58289877.

It can be written as a sum of positive squares in 2 ways, for example, as 28068804 + 49829481 = 5298^2 + 7059^2 .

It is not a de Polignac number, because 77898285 - 2⁵ = 77898253 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 865492 + ... + 865581.

It is an arithmetic number, because the mean of its divisors is an integer number (11251981).

Almost surely, 2^77898285 is an apocalyptic number.

It is an amenable number.

77898285 is a deficient number, since it is larger than the sum of its proper divisors (57125487).

77898285 is a wasteful number, since it uses less digits than its factorization.

77898285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731084 (or 1731081 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 77898285 is about 8826.0005098572. Note that the first 3 decimals coincide. The cubic root of 77898285 is about 427.0800636725.

The spelling of 77898285 in words is "seventy-seven million, eight hundred ninety-eight thousand, two hundred eighty-five".