28090805605775 has 48 divisors (see below), whose sum is σ = 38132975270880. Its totient is φ = 20357769062400.

The previous prime is 28090805605741. The next prime is 28090805605817. The reversal of 28090805605775 is 57750650809082.

It is a Cunningham number, because it is equal to 5300076²-1.

It is not a de Polignac number, because 28090805605775 - 2¹⁰ = 28090805604751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1457511539 + ... + 1457530811.

It is an arithmetic number, because the mean of its divisors is an integer number (794436984810).

Almost surely, 2^{28090805605775} is an apocalyptic number.

28090805605775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28090805605775 is a deficient number, since it is larger than the sum of its proper divisors (10042169665105).

28090805605775 is a wasteful number, since it uses less digits than its factorization.

28090805605775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37676 (or 37671 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 62.

The spelling of 28090805605775 in words is "twenty-eight trillion, ninety billion, eight hundred five million, six hundred five thousand, seven hundred seventy-five".