2028840 has 128 divisors (see below), whose sum is σ = 6998400. Its totient is φ = 465920.

The previous prime is 2028809. The next prime is 2028841. The reversal of 2028840 is 488202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2028840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38254 + ... + 38306.

It is an arithmetic number, because the mean of its divisors is an integer number (54675).

2^2028840 is an apocalyptic number.

2028840 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 2028840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3499200).

2028840 is an abundant number, since it is smaller than the sum of its proper divisors (4969560).

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

2028840 is a wasteful number, since it uses less digits than its factorization.

2028840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 2028840 is about 1424.3735465109. The cubic root of 2028840 is about 126.5948192115.

The spelling of 2028840 in words is "two million, twenty-eight thousand, eight hundred forty".