689946858 has 24 divisors (see below), whose sum is σ = 1498131648. Its totient is φ = 229482792.

The previous prime is 689946821. The next prime is 689946863. The reversal of 689946858 is 858649986.

689946858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 689946795 and 689946804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33060 + ... + 49727.

It is an arithmetic number, because the mean of its divisors is an integer number (62422152).

Almost surely, 2^689946858 is an apocalyptic number.

689946858 is an abundant number, since it is smaller than the sum of its proper divisors (808184790).

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

689946858 is a wasteful number, since it uses less digits than its factorization.

689946858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83258 (or 83255 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The square root of 689946858 is about 26266.8395129677. The cubic root of 689946858 is about 883.6329060418.

The spelling of 689946858 in words is "six hundred eighty-nine million, nine hundred forty-six thousand, eight hundred fifty-eight".