786868688 has 20 divisors (see below), whose sum is σ = 1525067940. Its totient is φ = 393302784.

The previous prime is 786868633. The next prime is 786868697. The reversal of 786868688 is 886868687.

It can be written as a sum of positive squares in 2 ways, for example, as 446392384 + 340476304 = 21128^2 + 18452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56606 + ... + 69122.

It is an arithmetic number, because the mean of its divisors is an integer number (76253397).

Almost surely, 2^786868688 is an apocalyptic number.

It is an amenable number.

786868688 is a deficient number, since it is larger than the sum of its proper divisors (738199252).

786868688 is a wasteful number, since it uses less digits than its factorization.

786868688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16454 (or 16448 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 65.

The square root of 786868688 is about 28051.1797969355. The cubic root of 786868688 is about 923.2105411162.

Subtracting 786868688 from its reverse (886868687), we obtain a palindrome (99999999).

The spelling of 786868688 in words is "seven hundred eighty-six million, eight hundred sixty-eight thousand, six hundred eighty-eight".