28028098 has 12 divisors (see below), whose sum is σ = 48906342. Its totient is φ = 12012000.

The previous prime is 28028081. The next prime is 28028101. The reversal of 28028098 is 89082082.

It can be written as a sum of positive squares in only one way, i.e., 22724289 + 5303809 = 4767^2 + 2303^2 .

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 5 ways as a sum of consecutive naturals, for example, 142903 + ... + 143098.

Almost surely, 2^28028098 is an apocalyptic number.

28028098 is a deficient number, since it is larger than the sum of its proper divisors (20878244).

28028098 is a wasteful number, since it uses less digits than its factorization.

28028098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286017 (or 286010 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 28028098 is about 5294.1569678278. The cubic root of 28028098 is about 303.7604371311.

The spelling of 28028098 in words is "twenty-eight million, twenty-eight thousand, ninety-eight".