28273130 has 16 divisors (see below), whose sum is σ = 51010344. Its totient is φ = 11282880.

The previous prime is 28273117. The next prime is 28273171. The reversal of 28273130 is 3137282.

It can be written as a sum of positive squares in 4 ways, for example, as 26512201 + 1760929 = 5149^2 + 1327^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28273130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1544 + ... + 7676.

Almost surely, 2^28273130 is an apocalyptic number.

28273130 is a deficient number, since it is larger than the sum of its proper divisors (22737214).

28273130 is a wasteful number, since it uses less digits than its factorization.

28273130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28273130 is about 5317.2483485352. The cubic root of 28273130 is about 304.6430653851.

The spelling of 28273130 in words is "twenty-eight million, two hundred seventy-three thousand, one hundred thirty".