77268785 has 12 divisors (see below), whose sum is σ = 101918964. Its totient is φ = 56195040.

The previous prime is 77268781. The next prime is 77268787. The reversal of 77268785 is 58786277.

It can be written as a sum of positive squares in 2 ways, for example, as 52548001 + 24720784 = 7249^2 + 4972^2 .

It is not a de Polignac number, because 77268785 - 2² = 77268781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77268781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63254 + ... + 64463.

It is an arithmetic number, because the mean of its divisors is an integer number (8493247).

Almost surely, 2^77268785 is an apocalyptic number.

It is an amenable number.

77268785 is a deficient number, since it is larger than the sum of its proper divisors (24650179).

77268785 is a wasteful number, since it uses less digits than its factorization.

77268785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127744 (or 127733 counting only the distinct ones).

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

The square root of 77268785 is about 8790.2664919785. The cubic root of 77268785 is about 425.9265322547.

It can be divided in two parts, 77 and 268785, that added together give a palindrome (268862).

The spelling of 77268785 in words is "seventy-seven million, two hundred sixty-eight thousand, seven hundred eighty-five".