28971378888 has 32 divisors (see below), whose sum is σ = 72445095360. Its totient is φ = 9654906560.

The previous prime is 28971378883. The next prime is 28971378893. The reversal of 28971378888 is 88887317982.

It is an interprime number because it is at equal distance from previous prime (28971378883) and next prime (28971378893).

It is not an unprimeable number, because it can be changed into a prime (28971378883) 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, 30420 + ... + 242627.

It is an arithmetic number, because the mean of its divisors is an integer number (2263909230).

Almost surely, 2^28971378888 is an apocalyptic number.

It is an amenable number.

28971378888 is an abundant number, since it is smaller than the sum of its proper divisors (43473716472).

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

28971378888 is a wasteful number, since it uses less digits than its factorization.

28971378888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277477 (or 277473 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 69.

The spelling of 28971378888 in words is "twenty-eight billion, nine hundred seventy-one million, three hundred seventy-eight thousand, eight hundred eighty-eight".