28454185 has 4 divisors (see below), whose sum is σ = 34145028. Its totient is φ = 22763344.

The previous prime is 28454177. The next prime is 28454201. The reversal of 28454185 is 58145482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58145482 = 2 ⋅29072741.

It can be written as a sum of positive squares in 2 ways, for example, as 4756761 + 23697424 = 2181^2 + 4868^2 .

It is a cyclic number.

It is not a de Polignac number, because 28454185 - 2³ = 28454177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2845414 + ... + 2845423.

It is an arithmetic number, because the mean of its divisors is an integer number (8536257).

Almost surely, 2^28454185 is an apocalyptic number.

It is an amenable number.

28454185 is a deficient number, since it is larger than the sum of its proper divisors (5690843).

28454185 is an equidigital number, since it uses as much as digits as its factorization.

28454185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690842.

The product of its digits is 51200, while the sum is 37.

The square root of 28454185 is about 5334.2464322526. The cubic root of 28454185 is about 305.2919715981.

The spelling of 28454185 in words is "twenty-eight million, four hundred fifty-four thousand, one hundred eighty-five".