28018068957 has 36 divisors (see below), whose sum is σ = 41547768444. Its totient is φ = 18194077440.

The previous prime is 28018068943. The next prime is 28018069069. The reversal of 28018068957 is 75986081082.

It can be written as a sum of positive squares in 2 ways, for example, as 24404375961 + 3613692996 = 156219^2 + 60114^2 .

It is not a de Polignac number, because 28018068957 - 2²² = 28013874653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018068157) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 6604357 + ... + 6608597.

It is an arithmetic number, because the mean of its divisors is an integer number (1154104679).

Almost surely, 2^28018068957 is an apocalyptic number.

It is an amenable number.

28018068957 is a deficient number, since it is larger than the sum of its proper divisors (13529699487).

28018068957 is a wasteful number, since it uses less digits than its factorization.

28018068957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730 (or 4684 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 28018068957 in words is "twenty-eight billion, eighteen million, sixty-eight thousand, nine hundred fifty-seven".