28538044417 has 8 divisors (see below), whose sum is σ = 28642720680. Its totient is φ = 28433418240.

The previous prime is 28538044399. The next prime is 28538044421. The reversal of 28538044417 is 71444083582.

It can be written as a sum of positive squares in 4 ways, for example, as 11023110081 + 17514934336 = 104991^2 + 132344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28538044417 - 2¹¹ = 28538042369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28538044477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428417 + ... + 1448257.

It is an arithmetic number, because the mean of its divisors is an integer number (3580340085).

It is a Proth number, since it is equal to 1701 ⋅ 2²⁴ + 1 and 1701 < 2²⁴.

Almost surely, 2^28538044417 is an apocalyptic number.

It is an amenable number.

28538044417 is a deficient number, since it is larger than the sum of its proper divisors (104676263).

28538044417 is a wasteful number, since it uses less digits than its factorization.

28538044417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25043.

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 28538044417 in words is "twenty-eight billion, five hundred thirty-eight million, forty-four thousand, four hundred seventeen".