28578505558 has 16 divisors (see below), whose sum is σ = 43703692560. Its totient is φ = 14010942816.

The previous prime is 28578505547. The next prime is 28578505567. The reversal of 28578505558 is 85550587582.

It is a super-3 number, since 3×28578505558³ (a number of 32 digits) contains 333 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89608 + ... + 255316.

It is an arithmetic number, because the mean of its divisors is an integer number (2731480785).

Almost surely, 2^28578505558 is an apocalyptic number.

28578505558 is a deficient number, since it is larger than the sum of its proper divisors (15125187002).

28578505558 is a wasteful number, since it uses less digits than its factorization.

28578505558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167391.

The product of its (nonzero) digits is 22400000, while the sum is 58.

The spelling of 28578505558 in words is "twenty-eight billion, five hundred seventy-eight million, five hundred five thousand, five hundred fifty-eight".