684811404 has 36 divisors (see below), whose sum is σ = 1733619160. Its totient is φ = 227931840.

The previous prime is 684811403. The next prime is 684811417. The reversal of 684811404 is 404118486.

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 not an unprimeable number, because it can be changed into a prime (684811403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11112 + ... + 38640.

Almost surely, 2^684811404 is an apocalyptic number.

It is an amenable number.

684811404 is an abundant number, since it is smaller than the sum of its proper divisors (1048807756).

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

684811404 is a wasteful number, since it uses less digits than its factorization.

684811404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28230 (or 28225 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 684811404 is about 26168.9014671996. The cubic root of 684811404 is about 881.4350740914.

The spelling of 684811404 in words is "six hundred eighty-four million, eight hundred eleven thousand, four hundred four".