28500319 has 4 divisors (see below), whose sum is σ = 28565680. Its totient is φ = 28434960.

The previous prime is 28500317. The next prime is 28500331. The reversal of 28500319 is 91300582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91300582 = 2 ⋅45650291.

It is a cyclic number.

It is not a de Polignac number, because 28500319 - 2¹ = 28500317 is a prime.

It is a super-2 number, since 2×28500319² = 1624536366203522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28500317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32022 + ... + 32899.

It is an arithmetic number, because the mean of its divisors is an integer number (7141420).

Almost surely, 2^28500319 is an apocalyptic number.

28500319 is a deficient number, since it is larger than the sum of its proper divisors (65361).

28500319 is an equidigital number, since it uses as much as digits as its factorization.

28500319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65360.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 28500319 is about 5338.5690030194. The cubic root of 28500319 is about 305.4568768638.

The spelling of 28500319 in words is "twenty-eight million, five hundred thousand, three hundred nineteen".