28915268 has 6 divisors (see below), whose sum is σ = 50601726. Its totient is φ = 14457632.

The previous prime is 28915261. The next prime is 28915309. The reversal of 28915268 is 86251982.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 7828804 = 4592^2 + 2798^2 .

It is not an unprimeable number, because it can be changed into a prime (28915261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3614405 + ... + 3614412.

It is an arithmetic number, because the mean of its divisors is an integer number (8433621).

Almost surely, 2^28915268 is an apocalyptic number.

It is an amenable number.

28915268 is a deficient number, since it is larger than the sum of its proper divisors (21686458).

28915268 is a wasteful number, since it uses less digits than its factorization.

28915268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228821 (or 7228819 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 28915268 is about 5377.2918834670. The cubic root of 28915268 is about 306.9321682021.

The spelling of 28915268 in words is "twenty-eight million, nine hundred fifteen thousand, two hundred sixty-eight".