685163400 has 96 divisors (see below), whose sum is σ = 2153240160. Its totient is φ = 180195840.

The previous prime is 685163371. The next prime is 685163417. The reversal of 685163400 is 4361586.

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 23 ways as a sum of consecutive naturals, for example, 35979 + ... + 51621.

It is an arithmetic number, because the mean of its divisors is an integer number (22429585).

Almost surely, 2^685163400 is an apocalyptic number.

685163400 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 685163400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076620080).

685163400 is an abundant number, since it is smaller than the sum of its proper divisors (1468076760).

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

685163400 is a wasteful number, since it uses less digits than its factorization.

685163400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15735 (or 15726 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 685163400 is about 26175.6260670113. The cubic root of 685163400 is about 881.5860686938.

The spelling of 685163400 in words is "six hundred eighty-five million, one hundred sixty-three thousand, four hundred".