28043123 has 4 divisors (see below), whose sum is σ = 28080360. Its totient is φ = 28005888.

The previous prime is 28043117. The next prime is 28043129. The reversal of 28043123 is 32134082.

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

It is an interprime number because it is at equal distance from previous prime (28043117) and next prime (28043129).

It is a cyclic number.

It is not a de Polignac number, because 28043123 - 2¹⁰ = 28042099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28043129) 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, 17465 + ... + 19002.

It is an arithmetic number, because the mean of its divisors is an integer number (7020090).

Almost surely, 2^28043123 is an apocalyptic number.

28043123 is a deficient number, since it is larger than the sum of its proper divisors (37237).

28043123 is an equidigital number, since it uses as much as digits as its factorization.

28043123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37236.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28043123 is about 5295.5757949443. The cubic root of 28043123 is about 303.8147063062.

The spelling of 28043123 in words is "twenty-eight million, forty-three thousand, one hundred twenty-three".