28021190 has 16 divisors (see below), whose sum is σ = 50695200. Its totient is φ = 11151360.

The previous prime is 28021187. The next prime is 28021193. The reversal of 28021190 is 9112082.

It is an interprime number because it is at equal distance from previous prime (28021187) and next prime (28021193).

It is a super-2 number, since 2×28021190² = 1570374178032200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28021193) 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 7 ways as a sum of consecutive naturals, for example, 5051 + ... + 9030.

It is an arithmetic number, because the mean of its divisors is an integer number (3168450).

Almost surely, 2^28021190 is an apocalyptic number.

28021190 is a deficient number, since it is larger than the sum of its proper divisors (22674010).

28021190 is a wasteful number, since it uses less digits than its factorization.

28021190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 28021190 is about 5293.5045102465. The cubic root of 28021190 is about 303.7354794438.

The spelling of 28021190 in words is "twenty-eight million, twenty-one thousand, one hundred ninety".