28043735866442 has 64 divisors (see below), whose sum is σ = 43461904859136. Its totient is φ = 13566639078720.

The previous prime is 28043735866403. The next prime is 28043735866451. The reversal of 28043735866442 is 24466853734082.

It is a super-2 number, since 2×28043735866442² (a number of 28 digits) contains 22 as substring.

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, 1306354193 + ... + 1306375659.

It is an arithmetic number, because the mean of its divisors is an integer number (679092263424).

Almost surely, 2^{28043735866442} is an apocalyptic number.

28043735866442 is a deficient number, since it is larger than the sum of its proper divisors (15418168992694).

28043735866442 is a wasteful number, since it uses less digits than its factorization.

28043735866442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22451.

The product of its (nonzero) digits is 185794560, while the sum is 62.

The spelling of 28043735866442 in words is "twenty-eight trillion, forty-three billion, seven hundred thirty-five million, eight hundred sixty-six thousand, four hundred forty-two".