1994004 has 48 divisors (see below), whose sum is σ = 5320000. Its totient is φ = 645408.

The previous prime is 1993997. The next prime is 1994033. The reversal of 1994004 is 4004991.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3747 + ... + 4245.

2^1994004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2660000).

1994004 is an abundant number, since it is smaller than the sum of its proper divisors (3325996).

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

1994004 is a wasteful number, since it uses less digits than its factorization.

1994004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1994004 is about 1412.0920649873. The cubic root of 1994004 is about 125.8660708451.

Adding to 1994004 its reverse (4004991), we get a palindrome (5998995).

The spelling of 1994004 in words is "one million, nine hundred ninety-four thousand, four".