28097152 has 32 divisors (see below), whose sum is σ = 56279520. Its totient is φ = 13972224.

The previous prime is 28097137. The next prime is 28097159. The reversal of 28097152 is 25179082.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×28097152² = 1578899901022208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28097159) 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 3 ways as a sum of consecutive naturals, for example, 28573 + ... + 29539.

It is an arithmetic number, because the mean of its divisors is an integer number (1758735).

Almost surely, 2^28097152 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 28097152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28139760).

28097152 is an abundant number, since it is smaller than the sum of its proper divisors (28182368).

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

28097152 is an equidigital number, since it uses as much as digits as its factorization.

28097152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 28097152 is about 5300.6746740391. The cubic root of 28097152 is about 304.0096949817.

The spelling of 28097152 in words is "twenty-eight million, ninety-seven thousand, one hundred fifty-two".