28423589 has 4 divisors (see below), whose sum is σ = 28582560. Its totient is φ = 28264620.

The previous prime is 28423583. The next prime is 28423613. The reversal of 28423589 is 98532482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98532482 = 2 ⋅49266241.

It is a cyclic number.

It is not a de Polignac number, because 28423589 - 2⁴ = 28423573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423583) 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, 79217 + ... + 79574.

It is an arithmetic number, because the mean of its divisors is an integer number (7145640).

Almost surely, 2^28423589 is an apocalyptic number.

It is an amenable number.

28423589 is a deficient number, since it is larger than the sum of its proper divisors (158971).

28423589 is a wasteful number, since it uses less digits than its factorization.

28423589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158970.

The product of its digits is 138240, while the sum is 41.

The square root of 28423589 is about 5331.3777768978. The cubic root of 28423589 is about 305.1825083433.

The spelling of 28423589 in words is "twenty-eight million, four hundred twenty-three thousand, five hundred eighty-nine".