28802855 has 4 divisors (see below), whose sum is σ = 34563432. Its totient is φ = 23042280.

The previous prime is 28802849. The next prime is 28802857. The reversal of 28802855 is 55820882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28802855 - 2¹⁰ = 28801831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28802857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880281 + ... + 2880290.

It is an arithmetic number, because the mean of its divisors is an integer number (8640858).

Almost surely, 2^28802855 is an apocalyptic number.

28802855 is a deficient number, since it is larger than the sum of its proper divisors (5760577).

28802855 is an equidigital number, since it uses as much as digits as its factorization.

28802855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760576.

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 28802855 is about 5366.8291383274. The cubic root of 28802855 is about 306.5339013886.

The spelling of 28802855 in words is "twenty-eight million, eight hundred two thousand, eight hundred fifty-five".