28887500 has 36 divisors (see below), whose sum is σ = 63214704. Its totient is φ = 11550000.

The previous prime is 28887497. The next prime is 28887511. The reversal of 28887500 is 578882.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11345 + ... + 13655.

It is an arithmetic number, because the mean of its divisors is an integer number (1755964).

Almost surely, 2^28887500 is an apocalyptic number.

28887500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28887500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31607352).

28887500 is an abundant number, since it is smaller than the sum of its proper divisors (34327204).

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

28887500 is an equidigital number, since it uses as much as digits as its factorization.

28887500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 28887500 is about 5374.7092944642. The cubic root of 28887500 is about 306.8338853832.

The spelling of 28887500 in words is "twenty-eight million, eight hundred eighty-seven thousand, five hundred".