685734512 has 80 divisors (see below), whose sum is σ = 1451907072. Its totient is φ = 312829440.

The previous prime is 685734499. The next prime is 685734547. The reversal of 685734512 is 215437586.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 685734512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708653 + ... + 709619.

Almost surely, 2^685734512 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 685734512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725953536).

685734512 is an abundant number, since it is smaller than the sum of its proper divisors (766172560).

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

685734512 is a wasteful number, since it uses less digits than its factorization.

685734512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1080 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 685734512 is about 26186.5330274933. The cubic root of 685734512 is about 881.8309468041.

The spelling of 685734512 in words is "six hundred eighty-five million, seven hundred thirty-four thousand, five hundred twelve".