28304765629057 has 4 divisors (see below), whose sum is σ = 28784507419440. Its totient is φ = 27825023838676.

The previous prime is 28304765629043. The next prime is 28304765629073. The reversal of 28304765629057 is 75092656740382.

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 28304765629057 - 2¹⁹ = 28304765104769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28304765629057.

It is not an unprimeable number, because it can be changed into a prime (28304765629757) 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, 239870895103 + ... + 239870895220.

It is an arithmetic number, because the mean of its divisors is an integer number (7196126854860).

Almost surely, 2^{28304765629057} is an apocalyptic number.

It is an amenable number.

28304765629057 is a deficient number, since it is larger than the sum of its proper divisors (479741790383).

28304765629057 is an equidigital number, since it uses as much as digits as its factorization.

28304765629057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479741790382.

The product of its (nonzero) digits is 152409600, while the sum is 64.

The spelling of 28304765629057 in words is "twenty-eight trillion, three hundred four billion, seven hundred sixty-five million, six hundred twenty-nine thousand, fifty-seven".