685737480 has 128 divisors (see below), whose sum is σ = 2150323200. Its totient is φ = 174720000.

The previous prime is 685737467. The next prime is 685737527. The reversal of 685737480 is 84737586.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350505 + ... + 352455.

It is an arithmetic number, because the mean of its divisors is an integer number (16799400).

Almost surely, 2^685737480 is an apocalyptic number.

685737480 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 685737480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075161600).

685737480 is an abundant number, since it is smaller than the sum of its proper divisors (1464585720).

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

685737480 is a wasteful number, since it uses less digits than its factorization.

685737480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2091 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 685737480 is about 26186.5896977823. The cubic root of 685737480 is about 881.8322190508.

The spelling of 685737480 in words is "six hundred eighty-five million, seven hundred thirty-seven thousand, four hundred eighty".