28130319 has 48 divisors (see below), whose sum is σ = 48859200. Its totient is φ = 15257088.

The previous prime is 28130303. The next prime is 28130321. The reversal of 28130319 is 91303182.

It is not a de Polignac number, because 28130319 - 2⁴ = 28130303 is a prime.

It is a super-2 number, since 2×28130319² = 1582629694083522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28130292 and 28130301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130339) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162517 + ... + 162689.

It is an arithmetic number, because the mean of its divisors is an integer number (1017900).

Almost surely, 2^28130319 is an apocalyptic number.

28130319 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28130319 is a deficient number, since it is larger than the sum of its proper divisors (20728881).

28130319 is a wasteful number, since it uses less digits than its factorization.

28130319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 28130319 is about 5303.8023153206. The cubic root of 28130319 is about 304.1292696709.

The spelling of 28130319 in words is "twenty-eight million, one hundred thirty thousand, three hundred nineteen".