687826436 has 36 divisors (see below), whose sum is σ = 1327311804. Its totient is φ = 311646720.

The previous prime is 687826417. The next prime is 687826441. The reversal of 687826436 is 634628786.

687826436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 414122500 + 273703936 = 20350^2 + 16544^2 .

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, 161000 + ... + 165216.

Almost surely, 2^687826436 is an apocalyptic number.

It is an amenable number.

687826436 is a deficient number, since it is larger than the sum of its proper divisors (639485368).

687826436 is a wasteful number, since it uses less digits than its factorization.

687826436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580 (or 4567 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 50.

The square root of 687826436 is about 26226.4453557854. The cubic root of 687826436 is about 882.7267505514.

The spelling of 687826436 in words is "six hundred eighty-seven million, eight hundred twenty-six thousand, four hundred thirty-six".