28404581165 has 8 divisors (see below), whose sum is σ = 34878183648. Its totient is φ = 22195207440.

The previous prime is 28404581089. The next prime is 28404581173. The reversal of 28404581165 is 56118540482.

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

It is not a de Polignac number, because 28404581165 - 2²⁰ = 28403532589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 66056951 + ... + 66057380.

It is an arithmetic number, because the mean of its divisors is an integer number (4359772956).

Almost surely, 2^28404581165 is an apocalyptic number.

It is an amenable number.

28404581165 is a deficient number, since it is larger than the sum of its proper divisors (6473602483).

28404581165 is a wasteful number, since it uses less digits than its factorization.

28404581165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132114379.

The product of its (nonzero) digits is 307200, while the sum is 44.

The spelling of 28404581165 in words is "twenty-eight billion, four hundred four million, five hundred eighty-one thousand, one hundred sixty-five".