684910404 has 240 divisors, whose sum is σ = 2018705920. Its totient is φ = 201553920.

The previous prime is 684910403. The next prime is 684910427. The reversal of 684910404 is 404019486.

It is a happy number.

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 (684910403) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7060884 + ... + 7060980.

Almost surely, 2^684910404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684910404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009352960).

684910404 is an abundant number, since it is smaller than the sum of its proper divisors (1333795516).

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

684910404 is a wasteful number, since it uses less digits than its factorization.

684910404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 684910404 is about 26170.7929570351. The cubic root of 684910404 is about 881.4775470346.

The spelling of 684910404 in words is "six hundred eighty-four million, nine hundred ten thousand, four hundred four".