28515448 has 16 divisors (see below), whose sum is σ = 57579480. Its totient is φ = 13160928.

The previous prime is 28515427. The next prime is 28515449. The reversal of 28515448 is 84451582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28515449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136990 + ... + 137197.

Almost surely, 2^28515448 is an apocalyptic number.

It is an amenable number.

28515448 is an abundant number, since it is smaller than the sum of its proper divisors (29064032).

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

28515448 is a wasteful number, since it uses less digits than its factorization.

28515448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274206 (or 274202 counting only the distinct ones).

The product of its digits is 51200, while the sum is 37.

The square root of 28515448 is about 5339.9857677713. The cubic root of 28515448 is about 305.5109164884.

The spelling of 28515448 in words is "twenty-eight million, five hundred fifteen thousand, four hundred forty-eight".