28474223 has 4 divisors (see below), whose sum is σ = 28756248. Its totient is φ = 28192200.

The previous prime is 28474211. The next prime is 28474249. The reversal of 28474223 is 32247482.

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

It is a cyclic number.

It is not a de Polignac number, because 28474223 - 2²² = 24279919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28474223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28474273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140861 + ... + 141062.

It is an arithmetic number, because the mean of its divisors is an integer number (7189062).

Almost surely, 2^28474223 is an apocalyptic number.

28474223 is a deficient number, since it is larger than the sum of its proper divisors (282025).

28474223 is a wasteful number, since it uses less digits than its factorization.

28474223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282024.

The product of its digits is 21504, while the sum is 32.

The square root of 28474223 is about 5336.1243426292. The cubic root of 28474223 is about 305.3636189976.

The spelling of 28474223 in words is "twenty-eight million, four hundred seventy-four thousand, two hundred twenty-three".