684727872 has 112 divisors (see below), whose sum is σ = 1867643712. Its totient is φ = 221276160.

The previous prime is 684727807. The next prime is 684727891. The reversal of 684727872 is 278727486.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1626222 + ... + 1626642.

Almost surely, 2^684727872 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 684727872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933821856).

684727872 is an abundant number, since it is smaller than the sum of its proper divisors (1182915840).

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

684727872 is a wasteful number, since it uses less digits than its factorization.

684727872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 666 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 51.

The square root of 684727872 is about 26167.3054019706. The cubic root of 684727872 is about 881.3992340397.

The spelling of 684727872 in words is "six hundred eighty-four million, seven hundred twenty-seven thousand, eight hundred seventy-two".