689443040 has 96 divisors (see below), whose sum is σ = 1913629536. Its totient is φ = 231413760.

The previous prime is 689443021. The next prime is 689443057. The reversal of 689443040 is 40344986.

It is a junction number, because it is equal to n+sod(n) for n = 689442985 and 689443003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7814 + ... + 37946.

It is an arithmetic number, because the mean of its divisors is an integer number (19933641).

Almost surely, 2^689443040 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 689443040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956814768).

689443040 is an abundant number, since it is smaller than the sum of its proper divisors (1224186496).

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

689443040 is a wasteful number, since it uses less digits than its factorization.

689443040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30172 (or 30164 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 689443040 is about 26257.2473804853. The cubic root of 689443040 is about 883.4177693900.

The spelling of 689443040 in words is "six hundred eighty-nine million, four hundred forty-three thousand, forty".