28400573317 has 4 divisors (see below), whose sum is σ = 28588656736. Its totient is φ = 28212489900.

The previous prime is 28400573189. The next prime is 28400573321. The reversal of 28400573317 is 71337500482.

It is a happy number.

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 28400573317 - 2⁷ = 28400573189 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 28400573317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28400573347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94041483 + ... + 94041784.

It is an arithmetic number, because the mean of its divisors is an integer number (7147164184).

Almost surely, 2^28400573317 is an apocalyptic number.

It is an amenable number.

28400573317 is a deficient number, since it is larger than the sum of its proper divisors (188083419).

28400573317 is a wasteful number, since it uses less digits than its factorization.

28400573317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188083418.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 28400573317 in words is "twenty-eight billion, four hundred million, five hundred seventy-three thousand, three hundred seventeen".