685069632 has 168 divisors, whose sum is σ = 2130186240. Its totient is φ = 209249280.

The previous prime is 685069613. The next prime is 685069661. The reversal of 685069632 is 236960586.

It is a happy number.

685069632 is a `hidden beast` number, since 6 + 8 + 5 + 0 + 6 + 9 + 632 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1429969 + ... + 1430447.

It is an arithmetic number, because the mean of its divisors is an integer number (12679680).

Almost surely, 2^685069632 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 685069632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1065093120).

685069632 is an abundant number, since it is smaller than the sum of its proper divisors (1445116608).

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

685069632 is a wasteful number, since it uses less digits than its factorization.

685069632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 685069632 is about 26173.8348737819. The cubic root of 685069632 is about 881.5458503878.

The spelling of 685069632 in words is "six hundred eighty-five million, sixty-nine thousand, six hundred thirty-two".