20028250 has 32 divisors (see below), whose sum is σ = 40906944. Its totient is φ = 7282000.

The previous prime is 20028221. The next prime is 20028257. The reversal of 20028250 is 5282002.

It is a super-2 number, since 2×20028250² = 802261596125000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 892 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (1278342).

Almost surely, 2^20028250 is an apocalyptic number.

20028250 is an abundant number, since it is smaller than the sum of its proper divisors (20878694).

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

20028250 is a wasteful number, since it uses less digits than its factorization.

20028250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311 (or 7301 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20028250 is about 4475.2932864786. The cubic root of 20028250 is about 271.5695053618.

The spelling of 20028250 in words is "twenty million, twenty-eight thousand, two hundred fifty".