1990068 has 24 divisors (see below), whose sum is σ = 4666368. Its totient is φ = 660096.

The previous prime is 1990039. The next prime is 1990069. The reversal of 1990068 is 8600991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990069) 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, 4380 + ... + 4812.

It is an arithmetic number, because the mean of its divisors is an integer number (194432).

2^1990068 is an apocalyptic number.

It is an amenable number.

1990068 is an abundant number, since it is smaller than the sum of its proper divisors (2676300).

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

1990068 is a wasteful number, since it uses less digits than its factorization.

1990068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1990068 is about 1410.6976997217. The cubic root of 1990068 is about 125.7831998682.

The spelling of 1990068 in words is "one million, nine hundred ninety thousand, sixty-eight".