686126804 has 24 divisors (see below), whose sum is σ = 1325667168. Its totient is φ = 308116640.

The previous prime is 686126789. The next prime is 686126807. The reversal of 686126804 is 408621686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686126807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90287 + ... + 97590.

It is an arithmetic number, because the mean of its divisors is an integer number (55236132).

Almost surely, 2^686126804 is an apocalyptic number.

It is an amenable number.

686126804 is a deficient number, since it is larger than the sum of its proper divisors (639540364).

686126804 is a wasteful number, since it uses less digits than its factorization.

686126804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187975 (or 187973 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 686126804 is about 26194.0222951726. The cubic root of 686126804 is about 881.9990727448. Note that the first 3 decimals are identical.

The spelling of 686126804 in words is "six hundred eighty-six million, one hundred twenty-six thousand, eight hundred four".