28155259 has 8 divisors (see below), whose sum is σ = 31774320. Its totient is φ = 24712800.

The previous prime is 28155251. The next prime is 28155269. The reversal of 28155259 is 95255182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28155259 - 2³ = 28155251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28155251) 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 7 ways as a sum of consecutive naturals, for example, 43812 + ... + 44449.

It is an arithmetic number, because the mean of its divisors is an integer number (3971790).

Almost surely, 2^28155259 is an apocalyptic number.

28155259 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28155259 is a deficient number, since it is larger than the sum of its proper divisors (3619061).

28155259 is a wasteful number, since it uses less digits than its factorization.

28155259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88301.

The product of its digits is 36000, while the sum is 37.

The square root of 28155259 is about 5306.1529378637. The cubic root of 28155259 is about 304.2191222307.

The spelling of 28155259 in words is "twenty-eight million, one hundred fifty-five thousand, two hundred fifty-nine".