428438712866185 has 64 divisors (see below), whose sum is σ = 591291118978560. Its totient is φ = 291934763366400.

The previous prime is 428438712866113. The next prime is 428438712866249. The reversal of 428438712866185 is 581668217834824.

It is not a de Polignac number, because 428438712866185 - 2⁷ = 428438712866057 is a prime.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4647349071 + ... + 4647441259.

It is an arithmetic number, because the mean of its divisors is an integer number (9238923734040).

Almost surely, 2^{428438712866185} is an apocalyptic number.

It is an amenable number.

428438712866185 is a deficient number, since it is larger than the sum of its proper divisors (162852406112375).

428438712866185 is a wasteful number, since it uses less digits than its factorization.

428438712866185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93826.

The product of its digits is 990904320, while the sum is 73.

The spelling of 428438712866185 in words is "four hundred twenty-eight trillion, four hundred thirty-eight billion, seven hundred twelve million, eight hundred sixty-six thousand, one hundred eighty-five".