1990204 has 6 divisors (see below), whose sum is σ = 3482864. Its totient is φ = 995100.

The previous prime is 1990189. The next prime is 1990211. The reversal of 1990204 is 4020991.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 248772 + ... + 248779.

2^1990204 is an apocalyptic number.

It is an amenable number.

1990204 is a deficient number, since it is larger than the sum of its proper divisors (1492660).

1990204 is a wasteful number, since it uses less digits than its factorization.

1990204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497555 (or 497553 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1990204 is about 1410.7459019965. The cubic root of 1990204 is about 125.7860651179.

The spelling of 1990204 in words is "one million, nine hundred ninety thousand, two hundred four".