686742082 has 16 divisors (see below), whose sum is σ = 1113312312. Its totient is φ = 315826560.

The previous prime is 686742079. The next prime is 686742107. The reversal of 686742082 is 280247686.

686742082 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 667653921 + 19088161 = 25839^2 + 4369^2 .

It is a super-2 number, since 2×686742082² = 943229374379389448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39693 + ... + 54304.

Almost surely, 2^686742082 is an apocalyptic number.

686742082 is a deficient number, since it is larger than the sum of its proper divisors (426570230).

686742082 is a wasteful number, since it uses less digits than its factorization.

686742082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94293.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 686742082 is about 26205.7642895604. The cubic root of 686742082 is about 882.2626355392.

It can be divided in two parts, 68674 and 2082, that added together give a square (70756 = 266²).

The spelling of 686742082 in words is "six hundred eighty-six million, seven hundred forty-two thousand, eighty-two".