28098560 has 120 divisors (see below), whose sum is σ = 78640800. Its totient is φ = 9633792.

The previous prime is 28098547. The next prime is 28098589. The reversal of 28098560 is 6589082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4014077 + ... + 4014083.

It is an arithmetic number, because the mean of its divisors is an integer number (655340).

Almost surely, 2^28098560 is an apocalyptic number.

28098560 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 28098560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39320400).

28098560 is an abundant number, since it is smaller than the sum of its proper divisors (50542240).

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

28098560 is an frugal number, since it uses more digits than its factorization.

28098560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 28098560 is about 5300.8074856573. The cubic root of 28098560 is about 304.0147730586.

The spelling of 28098560 in words is "twenty-eight million, ninety-eight thousand, five hundred sixty".