1990396 has 12 divisors (see below), whose sum is σ = 3522960. Its totient is φ = 983840.

The previous prime is 1990381. The next prime is 1990433. The reversal of 1990396 is 6930991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (293580).

2^1990396 is an apocalyptic number.

It is an amenable number.

1990396 is a deficient number, since it is larger than the sum of its proper divisors (1532564).

1990396 is a wasteful number, since it uses less digits than its factorization.

1990396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684 (or 5682 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 1990396 is about 1410.8139494632. The cubic root of 1990396 is about 125.7901099542.

The spelling of 1990396 in words is "one million, nine hundred ninety thousand, three hundred ninety-six".