28711912320 has 1536 divisors, whose sum is σ = 136128384000. Its totient is φ = 5553930240.

The previous prime is 28711912309. The next prime is 28711912321. The reversal of 28711912320 is 2321911782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28711912321) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 926190705 + ... + 926190735.

It is an arithmetic number, because the mean of its divisors is an integer number (88625250).

Almost surely, 2^28711912320 is an apocalyptic number.

28711912320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28711912320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68064192000).

28711912320 is an abundant number, since it is smaller than the sum of its proper divisors (107416471680).

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

28711912320 is a wasteful number, since it uses less digits than its factorization.

28711912320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

It can be divided in two parts, 2871 and 1912320, that added together give a palindrome (1915191).

The spelling of 28711912320 in words is "twenty-eight billion, seven hundred eleven million, nine hundred twelve thousand, three hundred twenty".