28857443319 has 32 divisors (see below), whose sum is σ = 43775747840. Its totient is φ = 18778114656.

The previous prime is 28857443309. The next prime is 28857443323. The reversal of 28857443319 is 91334475882.

It is a happy number.

28857443319 is a `hidden beast` number, since 28 + 8 + 574 + 4 + 33 + 19 = 666.

It is not a de Polignac number, because 28857443319 - 2⁵ = 28857443287 is a prime.

It is a super-2 number, since 2×28857443319² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857443309) 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 31 ways as a sum of consecutive naturals, for example, 1881309 + ... + 1896585.

It is an arithmetic number, because the mean of its divisors is an integer number (1367992120).

Almost surely, 2^28857443319 is an apocalyptic number.

28857443319 is a deficient number, since it is larger than the sum of its proper divisors (14918304521).

28857443319 is a wasteful number, since it uses less digits than its factorization.

28857443319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16956 (or 16950 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 28857443319 in words is "twenty-eight billion, eight hundred fifty-seven million, four hundred forty-three thousand, three hundred nineteen".