685800026 has 16 divisors (see below), whose sum is σ = 1095517224. Its totient is φ = 320861184.

The previous prime is 685800023. The next prime is 685800047. The reversal of 685800026 is 620008586.

It can be written as a sum of positive squares in 4 ways, for example, as 668998225 + 16801801 = 25865^2 + 4099^2 .

It is not an unprimeable number, because it can be changed into a prime (685800023) 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, 52415 + ... + 64178.

Almost surely, 2^685800026 is an apocalyptic number.

685800026 is a deficient number, since it is larger than the sum of its proper divisors (409717198).

685800026 is a wasteful number, since it uses less digits than its factorization.

685800026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116785.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 685800026 is about 26187.7839077689. The cubic root of 685800026 is about 881.8590288251.

The spelling of 685800026 in words is "six hundred eighty-five million, eight hundred thousand, twenty-six".