1994636 has 12 divisors (see below), whose sum is σ = 3989328. Its totient is φ = 854832.

The previous prime is 1994623. The next prime is 1994647. The reversal of 1994636 is 6364991.

1994636 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1994636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35591 + ... + 35646.

It is an arithmetic number, because the mean of its divisors is an integer number (332444).

2^1994636 is an apocalyptic number.

It is an amenable number.

1994636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1994636 is a wasteful number, since it uses less digits than its factorization.

1994636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71248 (or 71246 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The square root of 1994636 is about 1412.3158287012. The cubic root of 1994636 is about 125.8793671999.

The spelling of 1994636 in words is "one million, nine hundred ninety-four thousand, six hundred thirty-six".