1985633 has 8 divisors (see below), whose sum is σ = 2251200. Its totient is φ = 1736208.

The previous prime is 1985623. The next prime is 1985639. The reversal of 1985633 is 3365891.

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

It is a cyclic number.

It is not a de Polignac number, because 1985633 - 2⁸ = 1985377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1985593 and 1985602.

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, 3773 + ... + 4266.

It is an arithmetic number, because the mean of its divisors is an integer number (281400).

2^1985633 is an apocalyptic number.

1985633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1985633 is a deficient number, since it is larger than the sum of its proper divisors (265567).

1985633 is a wasteful number, since it uses less digits than its factorization.

1985633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8071.

The product of its digits is 19440, while the sum is 35.

The square root of 1985633 is about 1409.1249057482. The cubic root of 1985633 is about 125.6896916051.

The spelling of 1985633 in words is "one million, nine hundred eighty-five thousand, six hundred thirty-three".