42728598538 has 8 divisors (see below), whose sum is σ = 64170967140. Its totient is φ = 21338276160.

The previous prime is 42728598511. The next prime is 42728598551. The reversal of 42728598538 is 83589582724.

It can be written as a sum of positive squares in 2 ways, for example, as 42071342769 + 657255769 = 205113^2 + 25637^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13009503 + ... + 13012786.

Almost surely, 2^42728598538 is an apocalyptic number.

42728598538 is a deficient number, since it is larger than the sum of its proper divisors (21442368602).

42728598538 is a wasteful number, since it uses less digits than its factorization.

42728598538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023112.

The product of its digits is 38707200, while the sum is 61.

The spelling of 42728598538 in words is "forty-two billion, seven hundred twenty-eight million, five hundred ninety-eight thousand, five hundred thirty-eight".