28343355538 has 24 divisors (see below), whose sum is σ = 44500969548. Its totient is φ = 13538106912.

The previous prime is 28343355487. The next prime is 28343355577. The reversal of 28343355538 is 83555334382.

It can be written as a sum of positive squares in 2 ways, for example, as 27736570849 + 606784689 = 166543^2 + 24633^2 .

It is a super-3 number, since 3×28343355538³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28343355491 and 28343355500.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 826420 + ... + 860032.

Almost surely, 2^28343355538 is an apocalyptic number.

28343355538 is a deficient number, since it is larger than the sum of its proper divisors (16157614010).

28343355538 is a wasteful number, since it uses less digits than its factorization.

28343355538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34458 (or 34435 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 49.

The spelling of 28343355538 in words is "twenty-eight billion, three hundred forty-three million, three hundred fifty-five thousand, five hundred thirty-eight".