1985738 has 8 divisors (see below), whose sum is σ = 2986788. Its totient is φ = 990144.

The previous prime is 1985729. The next prime is 1985741. The reversal of 1985738 is 8375891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1776889 + 208849 = 1333^2 + 457^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1985695 and 1985704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281 + ... + 2012.

2^1985738 is an apocalyptic number.

1985738 is a deficient number, since it is larger than the sum of its proper divisors (1001050).

1985738 is a wasteful number, since it uses less digits than its factorization.

1985738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728.

The product of its digits is 60480, while the sum is 41.

The square root of 1985738 is about 1409.1621624213. The cubic root of 1985738 is about 125.6919070506.

The spelling of 1985738 in words is "one million, nine hundred eighty-five thousand, seven hundred thirty-eight".