686552386 has 8 divisors (see below), whose sum is σ = 1109046204. Its totient is φ = 316870320.

The previous prime is 686552357. The next prime is 686552387. The reversal of 686552386 is 683255686.

It can be written as a sum of positive squares in 2 ways, for example, as 669205161 + 17347225 = 25869^2 + 4165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (686552387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13202905 + ... + 13202956.

Almost surely, 2^686552386 is an apocalyptic number.

686552386 is a deficient number, since it is larger than the sum of its proper divisors (422493818).

686552386 is a wasteful number, since it uses less digits than its factorization.

686552386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26405876.

The product of its digits is 2073600, while the sum is 49.

The square root of 686552386 is about 26202.1446832125. The cubic root of 686552386 is about 882.1813934400.

The spelling of 686552386 in words is "six hundred eighty-six million, five hundred fifty-two thousand, three hundred eighty-six".