684874400 has 72 divisors (see below), whose sum is σ = 1910815200. Its totient is φ = 234812160.

The previous prime is 684874397. The next prime is 684874409. The reversal of 684874400 is 4478486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684874409) 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, 55550 + ... + 66749.

It is an arithmetic number, because the mean of its divisors is an integer number (26539100).

Almost surely, 2^684874400 is an apocalyptic number.

It is an amenable number.

684874400 is an abundant number, since it is smaller than the sum of its proper divisors (1225940800).

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

684874400 is a wasteful number, since it uses less digits than its factorization.

684874400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122326 (or 122313 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 684874400 is about 26170.1050819442. The cubic root of 684874400 is about 881.4621010855.

The spelling of 684874400 in words is "six hundred eighty-four million, eight hundred seventy-four thousand, four hundred".