1990236 has 24 divisors (see below), whose sum is σ = 4846464. Its totient is φ = 634480.

The previous prime is 1990229. The next prime is 1990237. The reversal of 1990236 is 6320991.

It is a super-2 number, since 2×1990236² = 7922078671392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990237) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3330 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (201936).

2^1990236 is an apocalyptic number.

It is an amenable number.

1990236 is an abundant number, since it is smaller than the sum of its proper divisors (2856228).

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

1990236 is a wasteful number, since it uses less digits than its factorization.

1990236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7241 (or 7239 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1990236 is about 1410.7572434689. The cubic root of 1990236 is about 125.7867392754.

The spelling of 1990236 in words is "one million, nine hundred ninety thousand, two hundred thirty-six".