28664749071840 has 192 divisors, whose sum is σ = 104499339356160. Its totient is φ = 6469006602240.

The previous prime is 28664749071821. The next prime is 28664749071863. The reversal of 28664749071840 is 4817094746682.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 53729341 + ... + 54260220.

It is an arithmetic number, because the mean of its divisors is an integer number (544267392480).

Almost surely, 2^{28664749071840} is an apocalyptic number.

28664749071840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28664749071840 is an abundant number, since it is smaller than the sum of its proper divisors (75834590284320).

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

28664749071840 is a wasteful number, since it uses less digits than its factorization.

28664749071840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107989665 (or 107989657 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 66.

The spelling of 28664749071840 in words is "twenty-eight trillion, six hundred sixty-four billion, seven hundred forty-nine million, seventy-one thousand, eight hundred forty".