28870508 has 12 divisors (see below), whose sum is σ = 51889152. Its totient is φ = 14045040.

The previous prime is 28870493. The next prime is 28870511. The reversal of 28870508 is 80507882.

It is an unprimeable number.

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, 97388 + ... + 97683.

It is an arithmetic number, because the mean of its divisors is an integer number (4324096).

Almost surely, 2^28870508 is an apocalyptic number.

It is an amenable number.

28870508 is a deficient number, since it is larger than the sum of its proper divisors (23018644).

28870508 is a wasteful number, since it uses less digits than its factorization.

28870508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195112 (or 195110 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 28870508 is about 5373.1283252869. The cubic root of 28870508 is about 306.7737123675.

The spelling of 28870508 in words is "twenty-eight million, eight hundred seventy thousand, five hundred eight".