28849856 has 56 divisors (see below), whose sum is σ = 66422016. Its totient is φ = 12176640.

The previous prime is 28849829. The next prime is 28849883. The reversal of 28849856 is 65894882.

It is an interprime number because it is at equal distance from previous prime (28849829) and next prime (28849883).

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31355 + ... + 32261.

Almost surely, 2^28849856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28849856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33211008).

28849856 is an abundant number, since it is smaller than the sum of its proper divisors (37572160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28849856 is an equidigital number, since it uses as much as digits as its factorization.

28849856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 987 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 50.

The square root of 28849856 is about 5371.2061960048. The cubic root of 28849856 is about 306.7005465614.

The spelling of 28849856 in words is "twenty-eight million, eight hundred forty-nine thousand, eight hundred fifty-six".