684943344 has 80 divisors (see below), whose sum is σ = 2033872800. Its totient is φ = 220437504.

The previous prime is 684943313. The next prime is 684943349. The reversal of 684943344 is 443349486.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 684943344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684943349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14809 + ... + 39864.

It is an arithmetic number, because the mean of its divisors is an integer number (25423410).

Almost surely, 2^684943344 is an apocalyptic number.

It is an amenable number.

684943344 is an abundant number, since it is smaller than the sum of its proper divisors (1348929456).

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

684943344 is a wasteful number, since it uses less digits than its factorization.

684943344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54719 (or 54707 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The square root of 684943344 is about 26171.4222769799. The cubic root of 684943344 is about 881.4916780337.

The spelling of 684943344 in words is "six hundred eighty-four million, nine hundred forty-three thousand, three hundred forty-four".