689735880 has 48 divisors (see below), whose sum is σ = 2241642780. Its totient is φ = 183929472.

The previous prime is 689735861. The next prime is 689735881. The reversal of 689735880 is 88537986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 608411556 + 81324324 = 24666^2 + 9018^2 .

It is not an unprimeable number, because it can be changed into a prime (689735881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 957607 + ... + 958326.

Almost surely, 2^689735880 is an apocalyptic number.

689735880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689735880 is an abundant number, since it is smaller than the sum of its proper divisors (1551906900).

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

689735880 is a wasteful number, since it uses less digits than its factorization.

689735880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915950 (or 1915943 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 689735880 is about 26262.8231536520. The cubic root of 689735880 is about 883.5428285202.

The spelling of 689735880 in words is "six hundred eighty-nine million, seven hundred thirty-five thousand, eight hundred eighty".