28887936 has 128 divisors (see below), whose sum is σ = 95765760. Its totient is φ = 7495680.

The previous prime is 28887917. The next prime is 28887941. The reversal of 28887936 is 63978882.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 29080 + ... + 30056.

It is an arithmetic number, because the mean of its divisors is an integer number (748170).

Almost surely, 2^28887936 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 28887936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47882880).

28887936 is an abundant number, since it is smaller than the sum of its proper divisors (66877824).

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

28887936 is a wasteful number, since it uses less digits than its factorization.

28887936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1000 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 28887936 is about 5374.7498546444. The cubic root of 28887936 is about 306.8354290601.

The spelling of 28887936 in words is "twenty-eight million, eight hundred eighty-seven thousand, nine hundred thirty-six".