28505883 has 8 divisors (see below), whose sum is σ = 43437568. Its totient is φ = 16289064.

The previous prime is 28505881. The next prime is 28505903. The reversal of 28505883 is 38850582.

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

It is not a de Polignac number, because 28505883 - 2¹ = 28505881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28505881) 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, 678691 + ... + 678732.

It is an arithmetic number, because the mean of its divisors is an integer number (5429696).

Almost surely, 2^28505883 is an apocalyptic number.

28505883 is a deficient number, since it is larger than the sum of its proper divisors (14931685).

28505883 is a wasteful number, since it uses less digits than its factorization.

28505883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357433.

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 28505883 is about 5339.0900910174. The cubic root of 28505883 is about 305.4767532668.

The spelling of 28505883 in words is "twenty-eight million, five hundred five thousand, eight hundred eighty-three".