28538158528 has 56 divisors (see below), whose sum is σ = 63908970480. Its totient is φ = 12524574720.

The previous prime is 28538158507. The next prime is 28538158541. The reversal of 28538158528 is 82585183582.

It is a congruent number.

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, 678501 + ... + 719332.

Almost surely, 2^28538158528 is an apocalyptic number.

It is an amenable number.

28538158528 is an abundant number, since it is smaller than the sum of its proper divisors (35370811952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28538158528 is a wasteful number, since it uses less digits than its factorization.

28538158528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397885 (or 1397875 counting only the distinct ones).

The product of its digits is 6144000, while the sum is 55.

The spelling of 28538158528 in words is "twenty-eight billion, five hundred thirty-eight million, one hundred fifty-eight thousand, five hundred twenty-eight".