689394732740 has 96 divisors (see below), whose sum is σ = 1688652268800. Its totient is φ = 236316503808.

The previous prime is 689394732647. The next prime is 689394732751. The reversal of 689394732740 is 47237493986.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62029424 + ... + 62040536.

It is an arithmetic number, because the mean of its divisors is an integer number (17590127800).

Almost surely, 2^689394732740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689394732740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844326134400).

689394732740 is an abundant number, since it is smaller than the sum of its proper divisors (999257536060).

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

689394732740 is a wasteful number, since it uses less digits than its factorization.

689394732740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186 (or 20170 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 689394732740 in words is "six hundred eighty-nine billion, three hundred ninety-four million, seven hundred thirty-two thousand, seven hundred forty".