685397070 has 96 divisors (see below), whose sum is σ = 1888099200. Its totient is φ = 172020672.

The previous prime is 685397059. The next prime is 685397117. The reversal of 685397070 is 70793586.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277501 + ... + 279959.

It is an arithmetic number, because the mean of its divisors is an integer number (19667700).

Almost surely, 2^685397070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685397070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944049600).

685397070 is an abundant number, since it is smaller than the sum of its proper divisors (1202702130).

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

685397070 is a wasteful number, since it uses less digits than its factorization.

685397070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 685397070 is about 26180.0891900696. The cubic root of 685397070 is about 881.6862768109.

The spelling of 685397070 in words is "six hundred eighty-five million, three hundred ninety-seven thousand, seventy".