685724160 has 160 divisors (see below), whose sum is σ = 2391757632. Its totient is φ = 166215680.

The previous prime is 685724147. The next prime is 685724173. The reversal of 685724160 is 61427586.

It is an interprime number because it is at equal distance from previous prime (685724147) and next prime (685724173).

It is a tau number, because it is divible by the number of its divisors (160).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80422 + ... + 88538.

Almost surely, 2^685724160 is an apocalyptic number.

685724160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685724160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195878816).

685724160 is an abundant number, since it is smaller than the sum of its proper divisors (1706033472).

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

685724160 is a wasteful number, since it uses less digits than its factorization.

685724160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8154 (or 8138 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 685724160 is about 26186.3353678975. The cubic root of 685724160 is about 881.8265093433.

The spelling of 685724160 in words is "six hundred eighty-five million, seven hundred twenty-four thousand, one hundred sixty".