28097088 has 56 divisors (see below), whose sum is σ = 75590400. Its totient is φ = 9208320.

The previous prime is 28097087. The next prime is 28097101. The reversal of 28097088 is 88079082.

It is a happy number.

It is a super-4 number, since 4×28097088⁴ (a number of 31 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (28097087) 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 7 ways as a sum of consecutive naturals, for example, 10513 + ... + 12911.

Almost surely, 2^28097088 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 28097088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37795200).

28097088 is an abundant number, since it is smaller than the sum of its proper divisors (47493312).

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

28097088 is a wasteful number, since it uses less digits than its factorization.

28097088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475 (or 2465 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 28097088 is about 5300.6686370683. The cubic root of 28097088 is about 304.0094641560.

The spelling of 28097088 in words is "twenty-eight million, ninety-seven thousand, eighty-eight".