689201856 has 126 divisors (see below), whose sum is σ = 2298092940. Its totient is φ = 196906752.

The previous prime is 689201741. The next prime is 689201861. The reversal of 689201856 is 658102986.

It is a tau number, because it is divible by the number of its divisors (126).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16015 + ... + 40433.

Almost surely, 2^689201856 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 689201856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149046470).

689201856 is an abundant number, since it is smaller than the sum of its proper divisors (1608891084).

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

689201856 is a wasteful number, since it uses less digits than its factorization.

689201856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24451 (or 24431 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 689201856 is about 26252.6542658071. The cubic root of 689201856 is about 883.3147436775.

The spelling of 689201856 in words is "six hundred eighty-nine million, two hundred one thousand, eight hundred fifty-six".