28278105773 has 8 divisors (see below), whose sum is σ = 29072325600. Its totient is φ = 27485462160.

The previous prime is 28278105761. The next prime is 28278105787. The reversal of 28278105773 is 37750187282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28278105773 - 2²² = 28273911469 is a prime.

It is a super-2 number, since 2×28278105773² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28278105733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357623 + ... + 429476.

It is an arithmetic number, because the mean of its divisors is an integer number (3634040700).

Almost surely, 2^28278105773 is an apocalyptic number.

It is an amenable number.

28278105773 is a deficient number, since it is larger than the sum of its proper divisors (794219827).

28278105773 is an equidigital number, since it uses as much as digits as its factorization.

28278105773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788107.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 28278105773 in words is "twenty-eight billion, two hundred seventy-eight million, one hundred five thousand, seven hundred seventy-three".