28058465 has 16 divisors (see below), whose sum is σ = 34645968. Its totient is φ = 21805056.

The previous prime is 28058447. The next prime is 28058467. The reversal of 28058465 is 56485082.

It can be written as a sum of positive squares in 8 ways, for example, as 7907344 + 20151121 = 2812^2 + 4489^2 .

It is a cyclic number.

It is not a de Polignac number, because 28058465 - 2¹⁰ = 28057441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28058467) 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 15 ways as a sum of consecutive naturals, for example, 29477 + ... + 30413.

It is an arithmetic number, because the mean of its divisors is an integer number (2165373).

Almost surely, 2^28058465 is an apocalyptic number.

It is an amenable number.

28058465 is a deficient number, since it is larger than the sum of its proper divisors (6587503).

28058465 is a wasteful number, since it uses less digits than its factorization.

28058465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 28058465 is about 5297.0241645664. The cubic root of 28058465 is about 303.8701004631.

The spelling of 28058465 in words is "twenty-eight million, fifty-eight thousand, four hundred sixty-five".