689027844 has 12 divisors (see below), whose sum is σ = 1607731664. Its totient is φ = 229675944.

The previous prime is 689027839. The next prime is 689027851. The reversal of 689027844 is 448720986.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 689027793 and 689027802.

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, 28709482 + ... + 28709505.

Almost surely, 2^689027844 is an apocalyptic number.

It is an amenable number.

689027844 is an abundant number, since it is smaller than the sum of its proper divisors (918703820).

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

689027844 is a wasteful number, since it uses less digits than its factorization.

689027844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57418994 (or 57418992 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 689027844 is about 26249.3398774141. The cubic root of 689027844 is about 883.2403966620.

The spelling of 689027844 in words is "six hundred eighty-nine million, twenty-seven thousand, eight hundred forty-four".