20028030 has 64 divisors (see below), whose sum is σ = 52939008. Its totient is φ = 4808960.

The previous prime is 20028017. The next prime is 20028031. The reversal of 20028030 is 3082002.

It is a super-2 number, since 2×20028030² = 802243971361800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028031) 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, 44989 + ... + 45431.

It is an arithmetic number, because the mean of its divisors is an integer number (827172).

Almost surely, 2^20028030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20028030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26469504).

20028030 is an abundant number, since it is smaller than the sum of its proper divisors (32910978).

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

20028030 is a wasteful number, since it uses less digits than its factorization.

20028030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601.

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

The square root of 20028030 is about 4475.2687070164. The cubic root of 20028030 is about 271.5685110078.

The spelling of 20028030 in words is "twenty million, twenty-eight thousand, thirty".