689142460 has 24 divisors (see below), whose sum is σ = 1447948656. Its totient is φ = 275514240.

The previous prime is 689142439. The next prime is 689142527. The reversal of 689142460 is 64241986.

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, 36240 + ... + 51880.

It is an arithmetic number, because the mean of its divisors is an integer number (60331194).

Almost surely, 2^689142460 is an apocalyptic number.

It is an amenable number.

689142460 is an abundant number, since it is smaller than the sum of its proper divisors (758806196).

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

689142460 is a wasteful number, since it uses less digits than its factorization.

689142460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17853 (or 17851 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 689142460 is about 26251.5230034373. The cubic root of 689142460 is about 883.2893680108.

The spelling of 689142460 in words is "six hundred eighty-nine million, one hundred forty-two thousand, four hundred sixty".