28311240960 has 288 divisors, whose sum is σ = 104836596480. Its totient is φ = 7221215232.

The previous prime is 28311240949. The next prime is 28311240961. The reversal of 28311240960 is 6904211382.

28311240960 is a `hidden beast` number, since 2 + 83 + 112 + 409 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is not an unprimeable number, because it can be changed into a prime (28311240961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 777072 + ... + 812688.

It is an arithmetic number, because the mean of its divisors is an integer number (364015960).

Almost surely, 2^28311240960 is an apocalyptic number.

28311240960 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 28311240960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52418298240).

28311240960 is an abundant number, since it is smaller than the sum of its proper divisors (76525355520).

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

28311240960 is a wasteful number, since it uses less digits than its factorization.

28311240960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35670 (or 35650 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 28311240960 in words is "twenty-eight billion, three hundred eleven million, two hundred forty thousand, nine hundred sixty".