681835828 has 24 divisors (see below), whose sum is σ = 1246351680. Its totient is φ = 325765440.

The previous prime is 681835799. The next prime is 681835829. The reversal of 681835828 is 828538186.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681835829) 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, 104568 + ... + 110896.

It is an arithmetic number, because the mean of its divisors is an integer number (51931320).

Almost surely, 2^681835828 is an apocalyptic number.

It is an amenable number.

681835828 is a deficient number, since it is larger than the sum of its proper divisors (564515852).

681835828 is a wasteful number, since it uses less digits than its factorization.

681835828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527 (or 7525 counting only the distinct ones).

The product of its digits is 737280, while the sum is 49.

The square root of 681835828 is about 26111.9862898248. The cubic root of 681835828 is about 880.1565785433.

The spelling of 681835828 in words is "six hundred eighty-one million, eight hundred thirty-five thousand, eight hundred twenty-eight".