686253802 has 16 divisors (see below), whose sum is σ = 1109537352. Its totient is φ = 316454400.

The previous prime is 686253797. The next prime is 686253817. The reversal of 686253802 is 208352686.

It can be written as a sum of positive squares in 4 ways, for example, as 214886281 + 471367521 = 14659^2 + 21711^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20238 + ... + 42214.

Almost surely, 2^686253802 is an apocalyptic number.

686253802 is a deficient number, since it is larger than the sum of its proper divisors (423283550).

686253802 is a wasteful number, since it uses less digits than its factorization.

686253802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23193.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 686253802 is about 26196.4463620545. The cubic root of 686253802 is about 882.0534869859.

It can be divided in two parts, 68625 and 3802, that added together give a palindrome (72427).

The spelling of 686253802 in words is "six hundred eighty-six million, two hundred fifty-three thousand, eight hundred two".