28055555588 has 12 divisors (see below), whose sum is σ = 49099350300. Its totient is φ = 14027169792.

The previous prime is 28055555573. The next prime is 28055555603. The reversal of 28055555588 is 88555555082.

It is an interprime number because it is at equal distance from previous prime (28055555573) and next prime (28055555603).

It can be written as a sum of positive squares in 2 ways, for example, as 10842640384 + 17212915204 = 104128^2 + 131198^2 .

It is a super-2 number, since 2×28055555588² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38813 + ... + 240036.

It is an arithmetic number, because the mean of its divisors is an integer number (4091612525).

Almost surely, 2^28055555588 is an apocalyptic number.

It is an amenable number.

28055555588 is a deficient number, since it is larger than the sum of its proper divisors (21043794712).

28055555588 is a wasteful number, since it uses less digits than its factorization.

28055555588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304006 (or 304004 counting only the distinct ones).

The product of its (nonzero) digits is 16000000, while the sum is 56.

The spelling of 28055555588 in words is "twenty-eight billion, fifty-five million, five hundred fifty-five thousand, five hundred eighty-eight".