28791152 has 40 divisors (see below), whose sum is σ = 60735696. Its totient is φ = 13142016.

The previous prime is 28791109. The next prime is 28791163. The reversal of 28791152 is 25119782.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19463 + ... + 20889.

Almost surely, 2^28791152 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 28791152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30367848).

28791152 is an abundant number, since it is smaller than the sum of its proper divisors (31944544).

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

28791152 is a wasteful number, since it uses less digits than its factorization.

28791152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545 (or 1539 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 28791152 is about 5365.7387189463. The cubic root of 28791152 is about 306.4923794374.

The spelling of 28791152 in words is "twenty-eight million, seven hundred ninety-one thousand, one hundred fifty-two".