685801100 has 36 divisors (see below), whose sum is σ = 1490795208. Its totient is φ = 273840000.

The previous prime is 685801093. The next prime is 685801153. The reversal of 685801100 is 1108586.

It is a super-2 number, since 2×685801100² = 940646297522420000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

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, 54395 + ... + 65805.

It is an arithmetic number, because the mean of its divisors is an integer number (41410978).

Almost surely, 2^685801100 is an apocalyptic number.

It is an amenable number.

685801100 is an abundant number, since it is smaller than the sum of its proper divisors (804994108).

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

685801100 is a wasteful number, since it uses less digits than its factorization.

685801100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12026 (or 12019 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 685801100 is about 26187.8044135052. The cubic root of 685801100 is about 881.8594891712.

Adding to 685801100 its reverse (1108586), we get a palindrome (686909686).

The spelling of 685801100 in words is "six hundred eighty-five million, eight hundred one thousand, one hundred".