28265508 has 18 divisors (see below), whose sum is σ = 71449014. Its totient is φ = 9421824.

The previous prime is 28265507. The next prime is 28265533. The reversal of 28265508 is 80556282.

It can be written as a sum of positive squares in only one way, i.e., 25887744 + 2377764 = 5088^2 + 1542^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 785153 = 28265508 / (2 + 8 + 2 + 6 + 5 + 5 + 0 + 8).

It is not an unprimeable number, because it can be changed into a prime (28265507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392541 + ... + 392612.

Almost surely, 2^28265508 is an apocalyptic number.

It is an amenable number.

28265508 is an abundant number, since it is smaller than the sum of its proper divisors (43183506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28265508 is a wasteful number, since it uses less digits than its factorization.

28265508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785163 (or 785158 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28265508 is about 5316.5315761312. The cubic root of 28265508 is about 304.6156872333.

The spelling of 28265508 in words is "twenty-eight million, two hundred sixty-five thousand, five hundred eight".