689895760 has 40 divisors (see below), whose sum is σ = 1605868200. Its totient is φ = 275638272.

The previous prime is 689895743. The next prime is 689895763. The reversal of 689895760 is 67598986.

689895760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 136328976 + 553566784 = 11676^2 + 23528^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 689895695 and 689895704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689895763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71716 + ... + 80764.

It is an arithmetic number, because the mean of its divisors is an integer number (40146705).

Almost surely, 2^689895760 is an apocalyptic number.

It is an amenable number.

689895760 is an abundant number, since it is smaller than the sum of its proper divisors (915972440).

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

689895760 is a wasteful number, since it uses less digits than its factorization.

689895760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10015 (or 10009 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The square root of 689895760 is about 26265.8668236934. The cubic root of 689895760 is about 883.6110913235.

The spelling of 689895760 in words is "six hundred eighty-nine million, eight hundred ninety-five thousand, seven hundred sixty".