684795384 has 384 divisors, whose sum is σ = 2446080000. Its totient is φ = 178319232.

The previous prime is 684795383. The next prime is 684795389. The reversal of 684795384 is 483597486.

684795384 is a `hidden beast` number, since 68 + 47 + 9 + 538 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 684795384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684795383) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8668257 + ... + 8668335.

It is an arithmetic number, because the mean of its divisors is an integer number (6370000).

Almost surely, 2^684795384 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 684795384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223040000).

684795384 is an abundant number, since it is smaller than the sum of its proper divisors (1761284616).

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

684795384 is a wasteful number, since it uses less digits than its factorization.

684795384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 104 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 684795384 is about 26168.5953769017. The cubic root of 684795384 is about 881.4282008122.

The spelling of 684795384 in words is "six hundred eighty-four million, seven hundred ninety-five thousand, three hundred eighty-four".