28558823812 has 24 divisors (see below), whose sum is σ = 51830334360. Its totient is φ = 13752614400.

The previous prime is 28558823789. The next prime is 28558823827. The reversal of 28558823812 is 21832885582.

It can be written as a sum of positive squares in 4 ways, for example, as 4960948356 + 23597875456 = 70434^2 + 153616^2 .

It is a super-2 number, since 2×28558823812² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28558823812.

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, 260463 + ... + 353494.

It is an arithmetic number, because the mean of its divisors is an integer number (2159597265).

Almost surely, 2^28558823812 is an apocalyptic number.

It is an amenable number.

28558823812 is a deficient number, since it is larger than the sum of its proper divisors (23271510548).

28558823812 is a wasteful number, since it uses less digits than its factorization.

28558823812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614391 (or 614389 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 52.

The spelling of 28558823812 in words is "twenty-eight billion, five hundred fifty-eight million, eight hundred twenty-three thousand, eight hundred twelve".