689827728 has 20 divisors (see below), whose sum is σ = 1782055088. Its totient is φ = 229942560.

The previous prime is 689827709. The next prime is 689827769. The reversal of 689827728 is 827728986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7185658 + ... + 7185753.

Almost surely, 2^689827728 is an apocalyptic number.

It is an amenable number.

689827728 is an abundant number, since it is smaller than the sum of its proper divisors (1092227360).

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

689827728 is a wasteful number, since it uses less digits than its factorization.

689827728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14371422 (or 14371416 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The square root of 689827728 is about 26264.5717269481. The cubic root of 689827728 is about 883.5820454834.

The spelling of 689827728 in words is "six hundred eighty-nine million, eight hundred twenty-seven thousand, seven hundred twenty-eight".