28867855 has 8 divisors (see below), whose sum is σ = 34731072. Its totient is φ = 23034528.

The previous prime is 28867849. The next prime is 28867873. The reversal of 28867855 is 55876882.

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 a de Polignac number, because none of the positive numbers 2^k-28867855 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28867799 and 28867808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5287 + ... + 9256.

It is an arithmetic number, because the mean of its divisors is an integer number (4341384).

Almost surely, 2^28867855 is an apocalyptic number.

28867855 is a deficient number, since it is larger than the sum of its proper divisors (5863217).

28867855 is a wasteful number, since it uses less digits than its factorization.

28867855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14945.

The product of its digits is 1075200, while the sum is 49.

The square root of 28867855 is about 5372.8814429503. The cubic root of 28867855 is about 306.7643152855.

The spelling of 28867855 in words is "twenty-eight million, eight hundred sixty-seven thousand, eight hundred fifty-five".