1985636 has 24 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 936320.

The previous prime is 1985623. The next prime is 1985639. The reversal of 1985636 is 6365891.

It is a self number, because there is not a number n which added to its sum of digits gives 1985636.

It is not an unprimeable number, because it can be changed into a prime (1985639) 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, 10301 + ... + 10491.

It is an arithmetic number, because the mean of its divisors is an integer number (153216).

2^1985636 is an apocalyptic number.

It is an amenable number.

1985636 is a deficient number, since it is larger than the sum of its proper divisors (1691548).

1985636 is a wasteful number, since it uses less digits than its factorization.

1985636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 329 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 1985636 is about 1409.1259702383. The cubic root of 1985636 is about 125.6897549046.

The spelling of 1985636 in words is "one million, nine hundred eighty-five thousand, six hundred thirty-six".