28877885 has 8 divisors (see below), whose sum is σ = 34828800. Its totient is φ = 22985424.

The previous prime is 28877873. The next prime is 28877887. The reversal of 28877885 is 58877882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28877885 - 2⁴ = 28877869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877887) 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 7 ways as a sum of consecutive naturals, for example, 13517 + ... + 15506.

It is an arithmetic number, because the mean of its divisors is an integer number (4353600).

Almost surely, 2^28877885 is an apocalyptic number.

It is an amenable number.

28877885 is a deficient number, since it is larger than the sum of its proper divisors (5950915).

28877885 is a wasteful number, since it uses less digits than its factorization.

28877885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29227.

The product of its digits is 2007040, while the sum is 53.

The square root of 28877885 is about 5373.8147530409. The cubic root of 28877885 is about 306.7998391096.

The spelling of 28877885 in words is "twenty-eight million, eight hundred seventy-seven thousand, eight hundred eighty-five".