28885505 has 8 divisors (see below), whose sum is σ = 37813824. Its totient is φ = 21007600.

The previous prime is 28885501. The next prime is 28885511. The reversal of 28885505 is 50558882.

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

It is not a de Polignac number, because 28885505 - 2² = 28885501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28885501) 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, 262541 + ... + 262650.

It is an arithmetic number, because the mean of its divisors is an integer number (4726728).

Almost surely, 2^28885505 is an apocalyptic number.

It is an amenable number.

28885505 is a deficient number, since it is larger than the sum of its proper divisors (8928319).

28885505 is a wasteful number, since it uses less digits than its factorization.

28885505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525207.

The product of its (nonzero) digits is 128000, while the sum is 41.

The square root of 28885505 is about 5374.5236998268. The cubic root of 28885505 is about 306.8268218010.

The spelling of 28885505 in words is "twenty-eight million, eight hundred eighty-five thousand, five hundred five".