28009152 has 84 divisors (see below), whose sum is σ = 83302856. Its totient is φ = 9331200.

The previous prime is 28009139. The next prime is 28009153. The reversal of 28009152 is 25190082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28009153) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 14652 + ... + 16452.

Almost surely, 2^28009152 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 28009152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41651428).

28009152 is an abundant number, since it is smaller than the sum of its proper divisors (55293704).

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

28009152 is an equidigital number, since it uses as much as digits as its factorization.

28009152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828 (or 1806 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 28009152 is about 5292.3673341899. The cubic root of 28009152 is about 303.6919779434.

The spelling of 28009152 in words is "twenty-eight million, nine thousand, one hundred fifty-two".