28393265 has 8 divisors (see below), whose sum is σ = 34100520. Its totient is φ = 22695552.

The previous prime is 28393259. The next prime is 28393271. The reversal of 28393265 is 56239382.

It is an interprime number because it is at equal distance from previous prime (28393259) and next prime (28393271).

It can be written as a sum of positive squares in 4 ways, for example, as 440896 + 27952369 = 664^2 + 5287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28393265 - 2⁴ = 28393249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10691 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (4262565).

Almost surely, 2^28393265 is an apocalyptic number.

It is an amenable number.

28393265 is a deficient number, since it is larger than the sum of its proper divisors (5707255).

28393265 is a wasteful number, since it uses less digits than its factorization.

28393265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771.

The product of its digits is 77760, while the sum is 38.

The square root of 28393265 is about 5328.5331002068. The cubic root of 28393265 is about 305.0739406865.

The spelling of 28393265 in words is "twenty-eight million, three hundred ninety-three thousand, two hundred sixty-five".