28875188444 has 24 divisors (see below), whose sum is σ = 50772247680. Its totient is φ = 14368958064.

The previous prime is 28875188443. The next prime is 28875188509. The reversal of 28875188444 is 44488157882.

It is a happy number.

It is a super-2 number, since 2×28875188444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28875188443) by changing a digit.

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, 934547 + ... + 964949.

It is an arithmetic number, because the mean of its divisors is an integer number (2115510320).

Almost surely, 2^28875188444 is an apocalyptic number.

It is an amenable number.

28875188444 is a deficient number, since it is larger than the sum of its proper divisors (21897059236).

28875188444 is a wasteful number, since it uses less digits than its factorization.

28875188444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31529 (or 31527 counting only the distinct ones).

The product of its digits is 18350080, while the sum is 59.

The spelling of 28875188444 in words is "twenty-eight billion, eight hundred seventy-five million, one hundred eighty-eight thousand, four hundred forty-four".