20030028 has 48 divisors (see below), whose sum is σ = 50064000. Its totient is φ = 6213888.

The previous prime is 20030027. The next prime is 20030053. The reversal of 20030028 is 82003002.

It is a junction number, because it is equal to n+sod(n) for n = 20029989 and 20030016.

It is not an unprimeable number, because it can be changed into a prime (20030027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12708 + ... + 14196.

It is an arithmetic number, because the mean of its divisors is an integer number (1043000).

Almost surely, 2^20030028 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 20030028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25032000).

20030028 is an abundant number, since it is smaller than the sum of its proper divisors (30033972).

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

20030028 is a wasteful number, since it uses less digits than its factorization.

20030028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20030028 is about 4475.4919282689. The cubic root of 20030028 is about 271.5775412826.

The spelling of 20030028 in words is "twenty million, thirty thousand, twenty-eight".