1684947648 has 56 divisors (see below), whose sum is σ = 4461101568. Its totient is φ = 561270016.

The previous prime is 1684947623. The next prime is 1684947659. The reversal of 1684947648 is 8467494861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555865 + ... + 558887.

It is an arithmetic number, because the mean of its divisors is an integer number (79662528).

Almost surely, 2^1684947648 is an apocalyptic number.

It is an amenable number.

1684947648 is an abundant number, since it is smaller than the sum of its proper divisors (2776153920).

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

1684947648 is a wasteful number, since it uses less digits than its factorization.

1684947648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941 (or 5931 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The square root of 1684947648 is about 41048.1138178114. The cubic root of 1684947648 is about 1189.9502481377.

The spelling of 1684947648 in words is "one billion, six hundred eighty-four million, nine hundred forty-seven thousand, six hundred forty-eight".