28545315 has 32 divisors (see below), whose sum is σ = 49393920. Its totient is φ = 14027904.

The previous prime is 28545313. The next prime is 28545331. The reversal of 28545315 is 51354582.

It is not a de Polignac number, because 28545315 - 2¹ = 28545313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28545313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9192 + ... + 11898.

It is an arithmetic number, because the mean of its divisors is an integer number (1543560).

Almost surely, 2^28545315 is an apocalyptic number.

28545315 is a deficient number, since it is larger than the sum of its proper divisors (20848605).

28545315 is a wasteful number, since it uses less digits than its factorization.

28545315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its digits is 24000, while the sum is 33.

The square root of 28545315 is about 5342.7815789156. The cubic root of 28545315 is about 305.6175430284.

Adding to 28545315 its reverse (51354582), we get a palindrome (79899897).

The spelling of 28545315 in words is "twenty-eight million, five hundred forty-five thousand, three hundred fifteen".