28648265 has 8 divisors (see below), whose sum is σ = 34472328. Its totient is φ = 22855680.

The previous prime is 28648253. The next prime is 28648267. The reversal of 28648265 is 56284682.

It can be written as a sum of positive squares in 4 ways, for example, as 6190144 + 22458121 = 2488^2 + 4739^2 .

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

It is not a de Polignac number, because 28648265 - 2¹⁴ = 28631881 is a prime.

It is a super-3 number, since 3×28648265³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28648267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5816 + ... + 9545.

It is an arithmetic number, because the mean of its divisors is an integer number (4309041).

Almost surely, 2^28648265 is an apocalyptic number.

It is an amenable number.

28648265 is a deficient number, since it is larger than the sum of its proper divisors (5824063).

28648265 is a wasteful number, since it uses less digits than its factorization.

28648265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15739.

The product of its digits is 184320, while the sum is 41.

The square root of 28648265 is about 5352.4074022817. The cubic root of 28648265 is about 305.9845101590.

The spelling of 28648265 in words is "twenty-eight million, six hundred forty-eight thousand, two hundred sixty-five".