28873515 has 16 divisors (see below), whose sum is σ = 50397696. Its totient is φ = 13999200.

The previous prime is 28873501. The next prime is 28873519. The reversal of 28873515 is 51537882.

It is not a de Polignac number, because 28873515 - 2⁷ = 28873387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28873519) 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, 87331 + ... + 87660.

It is an arithmetic number, because the mean of its divisors is an integer number (3149856).

Almost surely, 2^28873515 is an apocalyptic number.

28873515 is a deficient number, since it is larger than the sum of its proper divisors (21524181).

28873515 is a wasteful number, since it uses less digits than its factorization.

28873515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175010.

The product of its digits is 67200, while the sum is 39.

The square root of 28873515 is about 5373.4081363693. The cubic root of 28873515 is about 306.7843626423.

The spelling of 28873515 in words is "twenty-eight million, eight hundred seventy-three thousand, five hundred fifteen".