28055323 has 4 divisors (see below), whose sum is σ = 28069488. Its totient is φ = 28041160.

The previous prime is 28055317. The next prime is 28055327. The reversal of 28055323 is 32355082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28055323 is a prime.

It is a super-2 number, since 2×28055323² = 1574202297268658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28055291 and 28055300.

It is not an unprimeable number, because it can be changed into a prime (28055327) 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 3 ways as a sum of consecutive naturals, for example, 3511 + ... + 8272.

It is an arithmetic number, because the mean of its divisors is an integer number (7017372).

Almost surely, 2^28055323 is an apocalyptic number.

28055323 is a deficient number, since it is larger than the sum of its proper divisors (14165).

28055323 is a wasteful number, since it uses less digits than its factorization.

28055323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14164.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 28055323 is about 5296.7275746446. The cubic root of 28055323 is about 303.8587575345.

It can be divided in two parts, 2805 and 5323, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 28055323 in words is "twenty-eight million, fifty-five thousand, three hundred twenty-three".