685815834 has 32 divisors (see below), whose sum is σ = 1502323200. Its totient is φ = 206990000.

The previous prime is 685815833. The next prime is 685815839. The reversal of 685815834 is 438518586.

It is not an unprimeable number, because it can be changed into a prime (685815833) 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, 4134 + ... + 37265.

It is an arithmetic number, because the mean of its divisors is an integer number (46947600).

Almost surely, 2^685815834 is an apocalyptic number.

685815834 is an abundant number, since it is smaller than the sum of its proper divisors (816507366).

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

685815834 is a wasteful number, since it uses less digits than its factorization.

685815834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41666.

The product of its digits is 921600, while the sum is 48.

The square root of 685815834 is about 26188.0857261465. The cubic root of 685815834 is about 881.8658045225.

The spelling of 685815834 in words is "six hundred eighty-five million, eight hundred fifteen thousand, eight hundred thirty-four".