28928115508 has 12 divisors (see below), whose sum is σ = 50631954660. Its totient is φ = 14461842752.

The previous prime is 28928115497. The next prime is 28928115509. The reversal of 28928115508 is 80551182982.

It can be written as a sum of positive squares in 2 ways, for example, as 13617022864 + 15311092644 = 116692^2 + 123738^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928115509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524191 + ... + 576742.

It is an arithmetic number, because the mean of its divisors is an integer number (4219329555).

Almost surely, 2^28928115508 is an apocalyptic number.

It is an amenable number.

28928115508 is a deficient number, since it is larger than the sum of its proper divisors (21703839152).

28928115508 is a wasteful number, since it uses less digits than its factorization.

28928115508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107506 (or 1107504 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 49.

The spelling of 28928115508 in words is "twenty-eight billion, nine hundred twenty-eight million, one hundred fifteen thousand, five hundred eight".