28644233558 has 16 divisors (see below), whose sum is σ = 43659786240. Its totient is φ = 14091482856.

The previous prime is 28644233531. The next prime is 28644233621. The reversal of 28644233558 is 85533244682.

It is a super-2 number, since 2×28644233558² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 14966 + ... + 239817.

It is an arithmetic number, because the mean of its divisors is an integer number (2728736640).

Almost surely, 2^28644233558 is an apocalyptic number.

28644233558 is a deficient number, since it is larger than the sum of its proper divisors (15015552682).

28644233558 is a wasteful number, since it uses less digits than its factorization.

28644233558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255691.

The product of its digits is 5529600, while the sum is 50.

The spelling of 28644233558 in words is "twenty-eight billion, six hundred forty-four million, two hundred thirty-three thousand, five hundred fifty-eight".