28549098 has 64 divisors (see below), whose sum is σ = 65888640. Its totient is φ = 9272880.

The previous prime is 28549093. The next prime is 28549123. The reversal of 28549098 is 89094582.

It is a super-2 number, since 2×28549098² = 1630101993227208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28549093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266761 + ... + 266867.

It is an arithmetic number, because the mean of its divisors is an integer number (1029510).

Almost surely, 2^28549098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28549098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32944320).

28549098 is an abundant number, since it is smaller than the sum of its proper divisors (37339542).

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

28549098 is an equidigital number, since it uses as much as digits as its factorization.

28549098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 28549098 is about 5343.1355962581. The cubic root of 28549098 is about 305.6310432017.

The spelling of 28549098 in words is "twenty-eight million, five hundred forty-nine thousand, ninety-eight".