687222786 has 16 divisors (see below), whose sum is σ = 1388055168. Its totient is φ = 226806000.

The previous prime is 687222763. The next prime is 687222797.

It is a happy number.

687222786 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566410 + ... + 567621.

It is an arithmetic number, because the mean of its divisors is an integer number (86753448).

Almost surely, 2^687222786 is an apocalyptic number.

687222786 is an abundant number, since it is smaller than the sum of its proper divisors (700832382).

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

687222786 is a wasteful number, since it uses less digits than its factorization.

687222786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134137.

The product of its digits is 903168, while the sum is 48.

The square root of 687222786 is about 26214.9344076997. The cubic root of 687222786 is about 882.4684421889.

The spelling of 687222786 in words is "six hundred eighty-seven million, two hundred twenty-two thousand, seven hundred eighty-six".