28448315 has 16 divisors (see below), whose sum is σ = 39365568. Its totient is φ = 19332096.

The previous prime is 28448311. The next prime is 28448323. The reversal of 28448315 is 51384482.

It is not a de Polignac number, because 28448315 - 2² = 28448311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28448311) 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 15 ways as a sum of consecutive naturals, for example, 359 + ... + 7551.

It is an arithmetic number, because the mean of its divisors is an integer number (2460348).

Almost surely, 2^28448315 is an apocalyptic number.

28448315 is a deficient number, since it is larger than the sum of its proper divisors (10917253).

28448315 is a wasteful number, since it uses less digits than its factorization.

28448315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7318.

The product of its digits is 30720, while the sum is 35.

The square root of 28448315 is about 5333.6961855734. The cubic root of 28448315 is about 305.2709765948.

The spelling of 28448315 in words is "twenty-eight million, four hundred forty-eight thousand, three hundred fifteen".