689511678 has 16 divisors (see below), whose sum is σ = 1412658576. Its totient is φ = 224231360.

The previous prime is 689511661. The next prime is 689511737. The reversal of 689511678 is 876115986.

It is a self number, because there is not a number n which added to its sum of digits gives 689511678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401201 + ... + 1401692.

It is an arithmetic number, because the mean of its divisors is an integer number (88291161).

Almost surely, 2^689511678 is an apocalyptic number.

689511678 is an abundant number, since it is smaller than the sum of its proper divisors (723146898).

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

689511678 is a wasteful number, since it uses less digits than its factorization.

689511678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802939.

The product of its digits is 725760, while the sum is 51.

The square root of 689511678 is about 26258.5543775738. The cubic root of 689511678 is about 883.4470848486.

The spelling of 689511678 in words is "six hundred eighty-nine million, five hundred eleven thousand, six hundred seventy-eight".