28098575 has 6 divisors (see below), whose sum is σ = 34842264. Its totient is φ = 22478840.

The previous prime is 28098547. The next prime is 28098589. The reversal of 28098575 is 57589082.

It is not a de Polignac number, because 28098575 - 2¹⁴ = 28082191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 561947 + ... + 561996.

It is an arithmetic number, because the mean of its divisors is an integer number (5807044).

Almost surely, 2^28098575 is an apocalyptic number.

28098575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28098575 is a deficient number, since it is larger than the sum of its proper divisors (6743689).

28098575 is a wasteful number, since it uses less digits than its factorization.

28098575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123953 (or 1123948 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 28098575 is about 5300.8089005358. The cubic root of 28098575 is about 304.0148271565.

The spelling of 28098575 in words is "twenty-eight million, ninety-eight thousand, five hundred seventy-five".