686621322 has 24 divisors (see below), whose sum is σ = 1488204900. Its totient is φ = 228792960.

The previous prime is 686621317. The next prime is 686621357. The reversal of 686621322 is 223126686.

686621322 is a `hidden beast` number, since 6 + 8 + 6 + 621 + 3 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 652853601 + 33767721 = 25551^2 + 5811^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68172 + ... + 77592.

Almost surely, 2^686621322 is an apocalyptic number.

686621322 is an abundant number, since it is smaller than the sum of its proper divisors (801583578).

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

686621322 is a wasteful number, since it uses less digits than its factorization.

686621322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478 (or 13475 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 686621322 is about 26203.4601150306. The cubic root of 686621322 is about 882.2109187525.

The spelling of 686621322 in words is "six hundred eighty-six million, six hundred twenty-one thousand, three hundred twenty-two".