689275280 has 20 divisors (see below), whose sum is σ = 1602565212. Its totient is φ = 275710080.

The previous prime is 689275267. The next prime is 689275309. The reversal of 689275280 is 82572986.

It can be written as a sum of positive squares in 2 ways, for example, as 203689984 + 485585296 = 14272^2 + 22036^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 4307891 + ... + 4308050.

Almost surely, 2^689275280 is an apocalyptic number.

It is an amenable number.

689275280 is an abundant number, since it is smaller than the sum of its proper divisors (913289932).

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

689275280 is a wasteful number, since it uses less digits than its factorization.

689275280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8615954 (or 8615948 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 689275280 is about 26254.0526395450. The cubic root of 689275280 is about 883.3461104912.

The spelling of 689275280 in words is "six hundred eighty-nine million, two hundred seventy-five thousand, two hundred eighty".