28875081 has 16 divisors (see below), whose sum is σ = 39124800. Its totient is φ = 18940608.

The previous prime is 28875073. The next prime is 28875083. The reversal of 28875081 is 18057882.

It is not a de Polignac number, because 28875081 - 2³ = 28875073 is a prime.

It is a super-2 number, since 2×28875081² = 1667540605513122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28875083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74035 + ... + 74423.

It is an arithmetic number, because the mean of its divisors is an integer number (2445300).

Almost surely, 2^28875081 is an apocalyptic number.

It is an amenable number.

28875081 is a deficient number, since it is larger than the sum of its proper divisors (10249719).

28875081 is a wasteful number, since it uses less digits than its factorization.

28875081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 28875081 is about 5373.5538519680. The cubic root of 28875081 is about 306.7899088510.

The spelling of 28875081 in words is "twenty-eight million, eight hundred seventy-five thousand, eighty-one".