2021790 has 32 divisors (see below), whose sum is σ = 5109120. Its totient is φ = 510624.

The previous prime is 2021783. The next prime is 2021801. The reversal of 2021790 is 971202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204 + ... + 2343.

It is an arithmetic number, because the mean of its divisors is an integer number (159660).

2^2021790 is an apocalyptic number.

2021790 is an abundant number, since it is smaller than the sum of its proper divisors (3087330).

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

2021790 is a wasteful number, since it uses less digits than its factorization.

2021790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 2021790 is about 1421.8966207147. The cubic root of 2021790 is about 126.4480145927.

Adding to 2021790 its reverse (971202), we get a palindrome (2992992).

The spelling of 2021790 in words is "two million, twenty-one thousand, seven hundred ninety".