2028404 has 36 divisors (see below), whose sum is σ = 4213440. Its totient is φ = 851760.

The previous prime is 2028401. The next prime is 2028413. The reversal of 2028404 is 4048202.

It is a super-2 number, since 2×2028404² = 8228845574432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15419 + ... + 15549.

It is an arithmetic number, because the mean of its divisors is an integer number (117040).

2^2028404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2028404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106720).

2028404 is an abundant number, since it is smaller than the sum of its proper divisors (2185036).

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

2028404 is a wasteful number, since it uses less digits than its factorization.

2028404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2028404 is about 1424.2204885480. The cubic root of 2028404 is about 126.5857501055.

The spelling of 2028404 in words is "two million, twenty-eight thousand, four hundred four".