1685065320 has 96 divisors (see below), whose sum is σ = 5500240200. Its totient is φ = 447399936.

The previous prime is 1685065301. The next prime is 1685065363. The reversal of 1685065320 is 235605861.

It can be written as a sum of positive squares in 4 ways, for example, as 768065796 + 916999524 = 27714^2 + 30282^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73836 + ... + 93924.

Almost surely, 2^1685065320 is an apocalyptic number.

1685065320 is a gapful number since it is divisible by the number (10) 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 1685065320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2750120100).

1685065320 is an abundant number, since it is smaller than the sum of its proper divisors (3815174880).

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

1685065320 is a wasteful number, since it uses less digits than its factorization.

1685065320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20339 (or 20332 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1685065320 is about 41049.5471351390. The cubic root of 1685065320 is about 1189.9779484180.

The spelling of 1685065320 in words is "one billion, six hundred eighty-five million, sixty-five thousand, three hundred twenty".