1685235384 has 96 divisors (see below), whose sum is σ = 5327262720. Its totient is φ = 471244608.

The previous prime is 1685235373. The next prime is 1685235397. The reversal of 1685235384 is 4835325861.

1685235384 is a `hidden beast` number, since 1 + 68 + 52 + 3 + 538 + 4 = 666.

It is a congruent number.

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, 11884 + ... + 59259.

It is an arithmetic number, because the mean of its divisors is an integer number (55492320).

Almost surely, 2^1685235384 is an apocalyptic number.

1685235384 is a gapful number since it is divisible by the number (14) 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 1685235384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663631360).

1685235384 is an abundant number, since it is smaller than the sum of its proper divisors (3642027336).

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

1685235384 is a wasteful number, since it uses less digits than its factorization.

1685235384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71209 (or 71202 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 1685235384 is about 41051.6185308204. The cubic root of 1685235384 is about 1190.0179796262.

The spelling of 1685235384 in words is "one billion, six hundred eighty-five million, two hundred thirty-five thousand, three hundred eighty-four".