1990868 has 12 divisors (see below), whose sum is σ = 3800832. Its totient is φ = 904920.

The previous prime is 1990867. The next prime is 1990871. The reversal of 1990868 is 8680991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22580 + ... + 22667.

It is an arithmetic number, because the mean of its divisors is an integer number (316736).

2^1990868 is an apocalyptic number.

It is an amenable number.

1990868 is a deficient number, since it is larger than the sum of its proper divisors (1809964).

1990868 is a wasteful number, since it uses less digits than its factorization.

1990868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45262 (or 45260 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1990868 is about 1410.9812188686. The cubic root of 1990868 is about 125.8000524044.

The spelling of 1990868 in words is "one million, nine hundred ninety thousand, eight hundred sixty-eight".