28478227588 has 24 divisors (see below), whose sum is σ = 50269201920. Its totient is φ = 14116109280.

The previous prime is 28478227571. The next prime is 28478227601. The reversal of 28478227588 is 88572287482.

It is a super-2 number, since 2×28478227588² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160243 + ... + 287461.

It is an arithmetic number, because the mean of its divisors is an integer number (2094550080).

Almost surely, 2^28478227588 is an apocalyptic number.

It is an amenable number.

28478227588 is a deficient number, since it is larger than the sum of its proper divisors (21790974332).

28478227588 is a wasteful number, since it uses less digits than its factorization.

28478227588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127707 (or 127705 counting only the distinct ones).

The product of its digits is 32112640, while the sum is 61.

The spelling of 28478227588 in words is "twenty-eight billion, four hundred seventy-eight million, two hundred twenty-seven thousand, five hundred eighty-eight".