686322642 has 32 divisors (see below), whose sum is σ = 1433044800. Its totient is φ = 218852928.

The previous prime is 686322631. The next prime is 686322643. The reversal of 686322642 is 246223686.

686322642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 686322642.

It is not an unprimeable number, because it can be changed into a prime (686322643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 873 + ... + 37059.

It is an arithmetic number, because the mean of its divisors is an integer number (44782650).

Almost surely, 2^686322642 is an apocalyptic number.

686322642 is an abundant number, since it is smaller than the sum of its proper divisors (746722158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686322642 is a wasteful number, since it uses less digits than its factorization.

686322642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36330.

The product of its digits is 165888, while the sum is 39.

The square root of 686322642 is about 26197.7602477769. The cubic root of 686322642 is about 882.0829797341.

The spelling of 686322642 in words is "six hundred eighty-six million, three hundred twenty-two thousand, six hundred forty-two".