715688 has 16 divisors (see below), whose sum is σ = 1353780. Its totient is φ = 354688.

The previous prime is 715681. The next prime is 715699. The reversal of 715688 is 886517.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 708964 + 6724 = 842^2 + 82^2 .

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 715688.

It is not an unprimeable number, because it can be changed into a prime (715681) by changing a digit.

715688 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 770 + ... + 1422.

2⁷¹⁵⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

715688 is a deficient number, since it is larger than the sum of its proper divisors (638092).

715688 is a wasteful number, since it uses less digits than its factorization.

715688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 792 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 715688 is about 845.9834513748. The cubic root of 715688 is about 89.4488123182.

The spelling of 715688 in words is "seven hundred fifteen thousand, six hundred eighty-eight".