28455855 has 8 divisors (see below), whose sum is σ = 45529392. Its totient is φ = 15176448.

The previous prime is 28455851. The next prime is 28455857. The reversal of 28455855 is 55855482.

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

It is not a de Polignac number, because 28455855 - 2² = 28455851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948514 + ... + 948543.

It is an arithmetic number, because the mean of its divisors is an integer number (5691174).

Almost surely, 2^28455855 is an apocalyptic number.

28455855 is a deficient number, since it is larger than the sum of its proper divisors (17073537).

28455855 is a wasteful number, since it uses less digits than its factorization.

28455855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897065.

The product of its digits is 320000, while the sum is 42.

The square root of 28455855 is about 5334.4029656560. The cubic root of 28455855 is about 305.2979440952.

The spelling of 28455855 in words is "twenty-eight million, four hundred fifty-five thousand, eight hundred fifty-five".