28968128902440 has 576 divisors, whose sum is σ = 117160375363200. Its totient is φ = 6077795862528.

The previous prime is 28968128902399. The next prime is 28968128902541. The reversal of 28968128902440 is 4420982186982.

28968128902440 is a `hidden beast` number, since 2 + 8 + 9 + 6 + 81 + 28 + 90 + 2 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 76042522 + ... + 76422518.

It is an arithmetic number, because the mean of its divisors is an integer number (203403429450).

Almost surely, 2^{28968128902440} is an apocalyptic number.

28968128902440 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 28968128902440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58580187681600).

28968128902440 is an abundant number, since it is smaller than the sum of its proper divisors (88192246460760).

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

28968128902440 is a wasteful number, since it uses less digits than its factorization.

28968128902440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380226 (or 380206 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 28968128902440 in words is "twenty-eight trillion, nine hundred sixty-eight billion, one hundred twenty-eight million, nine hundred two thousand, four hundred forty".