77768285 has 32 divisors (see below), whose sum is σ = 116847360. Its totient is φ = 48448512.

The previous prime is 77768269. The next prime is 77768291. The reversal of 77768285 is 58286777.

It is not a de Polignac number, because 77768285 - 2⁴ = 77768269 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 (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15002 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (3651480).

Almost surely, 2^77768285 is an apocalyptic number.

It is an amenable number.

77768285 is a deficient number, since it is larger than the sum of its proper divisors (39079075).

77768285 is a wasteful number, since it uses less digits than its factorization.

77768285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565.

The product of its digits is 1317120, while the sum is 50.

The square root of 77768285 is about 8818.6328305469. The cubic root of 77768285 is about 426.8423548796.

It can be divided in two parts, 7776 and 8285, that added together give a palindrome (16061).

The spelling of 77768285 in words is "seventy-seven million, seven hundred sixty-eight thousand, two hundred eighty-five".