28428854855017 has 4 divisors (see below), whose sum is σ = 29089991014480. Its totient is φ = 27767718695556.

The previous prime is 28428854855003. The next prime is 28428854855033. The reversal of 28428854855017 is 71055845882482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28428854855017 - 2⁷ = 28428854854889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28428854855057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330568079667 + ... + 330568079752.

It is an arithmetic number, because the mean of its divisors is an integer number (7272497753620).

Almost surely, 2^{28428854855017} is an apocalyptic number.

It is an amenable number.

28428854855017 is a deficient number, since it is larger than the sum of its proper divisors (661136159463).

28428854855017 is an equidigital number, since it uses as much as digits as its factorization.

28428854855017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661136159462.

The product of its (nonzero) digits is 229376000, while the sum is 67.

The spelling of 28428854855017 in words is "twenty-eight trillion, four hundred twenty-eight billion, eight hundred fifty-four million, eight hundred fifty-five thousand, seventeen".