28254469 has 4 divisors (see below), whose sum is σ = 28460844. Its totient is φ = 28048096.

The previous prime is 28254467. The next prime is 28254517. The reversal of 28254469 is 96445282.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24502500 + 3751969 = 4950^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 28254469 - 2¹ = 28254467 is a prime.

It is a super-2 number, since 2×28254469² = 1596630036943922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28254467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102982 + ... + 103255.

It is an arithmetic number, because the mean of its divisors is an integer number (7115211).

Almost surely, 2^28254469 is an apocalyptic number.

It is an amenable number.

28254469 is a deficient number, since it is larger than the sum of its proper divisors (206375).

28254469 is a wasteful number, since it uses less digits than its factorization.

28254469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206374.

The product of its digits is 138240, while the sum is 40.

The square root of 28254469 is about 5315.4932978981. The cubic root of 28254469 is about 304.5760265224.

The spelling of 28254469 in words is "twenty-eight million, two hundred fifty-four thousand, four hundred sixty-nine".