686576842 has 24 divisors (see below), whose sum is σ = 1189746144. Its totient is φ = 291066672.

The previous prime is 686576833. The next prime is 686576843. The reversal of 686576842 is 248675686.

It is a self number, because there is not a number n which added to its sum of digits gives 686576842.

It is not an unprimeable number, because it can be changed into a prime (686576843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1013808 + ... + 1014484.

It is an arithmetic number, because the mean of its divisors is an integer number (49572756).

Almost surely, 2^686576842 is an apocalyptic number.

686576842 is a deficient number, since it is larger than the sum of its proper divisors (503169302).

686576842 is an equidigital number, since it uses as much as digits as its factorization.

686576842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 793 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 52.

The square root of 686576842 is about 26202.6113584124. The cubic root of 686576842 is about 882.1918681794.

The spelling of 686576842 in words is "six hundred eighty-six million, five hundred seventy-six thousand, eight hundred forty-two".