28558465 has 12 divisors (see below), whose sum is σ = 37110204. Its totient is φ = 21088704.

The previous prime is 28558441. The next prime is 28558477. The reversal of 28558465 is 56485582.

It can be written as a sum of positive squares in 6 ways, for example, as 6880129 + 21678336 = 2623^2 + 4656^2 .

It is not a de Polignac number, because 28558465 - 2⁷ = 28558337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 16054 + ... + 17743.

It is an arithmetic number, because the mean of its divisors is an integer number (3092517).

Almost surely, 2^28558465 is an apocalyptic number.

It is an amenable number.

28558465 is a deficient number, since it is larger than the sum of its proper divisors (8551739).

28558465 is a wasteful number, since it uses less digits than its factorization.

28558465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33828 (or 33815 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The square root of 28558465 is about 5344.0120695971. The cubic root of 28558465 is about 305.6644655412.

The spelling of 28558465 in words is "twenty-eight million, five hundred fifty-eight thousand, four hundred sixty-five".