689936140 has 24 divisors (see below), whose sum is σ = 1468716480. Its totient is φ = 272193408.

The previous prime is 689936123. The next prime is 689936153. The reversal of 689936140 is 41639986.

689936140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 234820 + ... + 237739.

It is an arithmetic number, because the mean of its divisors is an integer number (61196520).

Almost surely, 2^689936140 is an apocalyptic number.

It is an amenable number.

689936140 is an abundant number, since it is smaller than the sum of its proper divisors (778780340).

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

689936140 is a wasteful number, since it uses less digits than its factorization.

689936140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472641 (or 472639 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 689936140 is about 26266.6354906752. The cubic root of 689936140 is about 883.6283304108.

The spelling of 689936140 in words is "six hundred eighty-nine million, nine hundred thirty-six thousand, one hundred forty".