681207804 has 36 divisors (see below), whose sum is σ = 1738669296. Its totient is φ = 224863488.

The previous prime is 681207773. The next prime is 681207823. The reversal of 681207804 is 408702186.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88149 + ... + 95564.

Almost surely, 2^681207804 is an apocalyptic number.

It is an amenable number.

681207804 is an abundant number, since it is smaller than the sum of its proper divisors (1057461492).

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

681207804 is a wasteful number, since it uses less digits than its factorization.

681207804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183826 (or 183821 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 681207804 is about 26099.9579310006. The cubic root of 681207804 is about 879.8862645709.

The spelling of 681207804 in words is "six hundred eighty-one million, two hundred seven thousand, eight hundred four".