1684894668 has 24 divisors (see below), whose sum is σ = 3932226480. Its totient is φ = 561516480.

The previous prime is 1684894663. The next prime is 1684894669. The reversal of 1684894668 is 8664984861.

It is not an unprimeable number, because it can be changed into a prime (1684894661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63478 + ... + 86018.

It is an arithmetic number, because the mean of its divisors is an integer number (163842770).

Almost surely, 2^1684894668 is an apocalyptic number.

It is an amenable number.

1684894668 is an abundant number, since it is smaller than the sum of its proper divisors (2247331812).

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

1684894668 is a wasteful number, since it uses less digits than its factorization.

1684894668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28777 (or 28775 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 60.

The square root of 1684894668 is about 41047.4684724893. The cubic root of 1684894668 is about 1189.9377760935.

The spelling of 1684894668 in words is "one billion, six hundred eighty-four million, eight hundred ninety-four thousand, six hundred sixty-eight".