686352442 has 8 divisors (see below), whose sum is σ = 1057353876. Its totient is φ = 333901152.

The previous prime is 686352439. The next prime is 686352449. The reversal of 686352442 is 244253686.

It can be written as a sum of positive squares in 2 ways, for example, as 680740281 + 5612161 = 26091^2 + 2369^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 686352395 and 686352404.

It is not an unprimeable number, because it can be changed into a prime (686352449) 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, 4637443 + ... + 4637590.

Almost surely, 2^686352442 is an apocalyptic number.

686352442 is a deficient number, since it is larger than the sum of its proper divisors (371001434).

686352442 is a wasteful number, since it uses less digits than its factorization.

686352442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9275072.

The product of its digits is 276480, while the sum is 40.

The square root of 686352442 is about 26198.3289925140. The cubic root of 686352442 is about 882.0957461750.

The spelling of 686352442 in words is "six hundred eighty-six million, three hundred fifty-two thousand, four hundred forty-two".