689039140 has 24 divisors (see below), whose sum is σ = 1460261880. Its totient is φ = 273086208.

The previous prime is 689039137. The next prime is 689039173. The reversal of 689039140 is 41930986.

It can be written as a sum of positive squares in 4 ways, for example, as 1340964 + 687698176 = 1158^2 + 26224^2 .

It is a junction number, because it is equal to n+sod(n) for n = 689039093 and 689039102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155857 + ... + 160216.

It is an arithmetic number, because the mean of its divisors is an integer number (60844245).

Almost surely, 2^689039140 is an apocalyptic number.

It is an amenable number.

689039140 is an abundant number, since it is smaller than the sum of its proper divisors (771222740).

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

689039140 is a wasteful number, since it uses less digits than its factorization.

689039140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316191 (or 316189 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 689039140 is about 26249.5550438479. Note that the first 3 decimals coincide. The cubic root of 689039140 is about 883.2452232831.

The spelling of 689039140 in words is "six hundred eighty-nine million, thirty-nine thousand, one hundred forty".