2021880 has 128 divisors (see below), whose sum is σ = 7257600. Its totient is φ = 440832.

The previous prime is 2021879. The next prime is 2021891. The reversal of 2021880 is 881202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24319 + ... + 24401.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2^2021880 is an apocalyptic number.

2021880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3628800).

2021880 is an abundant number, since it is smaller than the sum of its proper divisors (5235720).

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

2021880 is a wasteful number, since it uses less digits than its factorization.

2021880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 2021880 is about 1421.9282682330. The cubic root of 2021880 is about 126.4498908430.

The spelling of 2021880 in words is "two million, twenty-one thousand, eight hundred eighty".