685034280 has 512 divisors, whose sum is σ = 2801664000. Its totient is φ = 145566720.

The previous prime is 685034267. The next prime is 685034299. The reversal of 685034280 is 82430586.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 127 ways as a sum of consecutive naturals, for example, 8671281 + ... + 8671359.

It is an arithmetic number, because the mean of its divisors is an integer number (5472000).

Almost surely, 2^685034280 is an apocalyptic number.

685034280 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 685034280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400832000).

685034280 is an abundant number, since it is smaller than the sum of its proper divisors (2116629720).

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

685034280 is a wasteful number, since it uses less digits than its factorization.

685034280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 685034280 is about 26173.1595341487. The cubic root of 685034280 is about 881.5306865059.

The spelling of 685034280 in words is "six hundred eighty-five million, thirty-four thousand, two hundred eighty".