28458923 has 4 divisors (see below), whose sum is σ = 29064480. Its totient is φ = 27853368.

The previous prime is 28458917. The next prime is 28458929. The reversal of 28458923 is 32985482.

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 (28458917) and next prime (28458929).

It is a cyclic number.

It is not a de Polignac number, because 28458923 - 2⁸ = 28458667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28458929) 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, 302708 + ... + 302801.

It is an arithmetic number, because the mean of its divisors is an integer number (7266120).

Almost surely, 2^28458923 is an apocalyptic number.

28458923 is a deficient number, since it is larger than the sum of its proper divisors (605557).

28458923 is an equidigital number, since it uses as much as digits as its factorization.

28458923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605556.

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

The square root of 28458923 is about 5334.6905252320. The cubic root of 28458923 is about 305.3089157146.

The spelling of 28458923 in words is "twenty-eight million, four hundred fifty-eight thousand, nine hundred twenty-three".