28630265 has 8 divisors (see below), whose sum is σ = 34413768. Its totient is φ = 22865920.

The previous prime is 28630241. The next prime is 28630271. The reversal of 28630265 is 56203682.

It can be written as a sum of positive squares in 4 ways, for example, as 4932841 + 23697424 = 2221^2 + 4868^2 .

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

It is not a de Polignac number, because 28630265 - 2¹⁴ = 28613881 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 1262 + ... + 7671.

It is an arithmetic number, because the mean of its divisors is an integer number (4301721).

Almost surely, 2^28630265 is an apocalyptic number.

It is an amenable number.

28630265 is a deficient number, since it is larger than the sum of its proper divisors (5783503).

28630265 is an equidigital number, since it uses as much as digits as its factorization.

28630265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 28630265 is about 5350.7256517224. The cubic root of 28630265 is about 305.9204123261.

The spelling of 28630265 in words is "twenty-eight million, six hundred thirty thousand, two hundred sixty-five".