28130190 has 32 divisors (see below), whose sum is σ = 73650816. Its totient is φ = 6819360.

The previous prime is 28130159. The next prime is 28130191. The reversal of 28130190 is 9103182.

It is a super-2 number, since 2×28130190² = 1582615178872200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28130190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130191) 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, 42292 + ... + 42951.

It is an arithmetic number, because the mean of its divisors is an integer number (2301588).

Almost surely, 2^28130190 is an apocalyptic number.

28130190 is an abundant number, since it is smaller than the sum of its proper divisors (45520626).

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

28130190 is a wasteful number, since it uses less digits than its factorization.

28130190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85264.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 28130190 is about 5303.7901542199. The cubic root of 28130190 is about 304.1288047783.

The spelling of 28130190 in words is "twenty-eight million, one hundred thirty thousand, one hundred ninety".