1685728113 has 8 divisors (see below), whose sum is σ = 2249402688. Its totient is φ = 1122936144.

The previous prime is 1685728067. The next prime is 1685728139. The reversal of 1685728113 is 3118275861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1685728113 - 2⁶ = 1685728049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1685728193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216181 + ... + 223842.

It is an arithmetic number, because the mean of its divisors is an integer number (281175336).

Almost surely, 2^1685728113 is an apocalyptic number.

It is an amenable number.

1685728113 is a deficient number, since it is larger than the sum of its proper divisors (563674575).

1685728113 is a wasteful number, since it uses less digits than its factorization.

1685728113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441303.

The product of its digits is 80640, while the sum is 42.

The square root of 1685728113 is about 41057.6194268494. The cubic root of 1685728113 is about 1190.1339474484.

The spelling of 1685728113 in words is "one billion, six hundred eighty-five million, seven hundred twenty-eight thousand, one hundred thirteen".