428272865667 has 12 divisors (see below), whose sum is σ = 623066840760. Its totient is φ = 283461176448.

The previous prime is 428272865663. The next prime is 428272865693. The reversal of 428272865667 is 766568272824.

428272865667 is a `hidden beast` number, since 4 + 28 + 27 + 28 + 6 + 566 + 7 = 666.

It is not a de Polignac number, because 428272865667 - 2² = 428272865663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428272865663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171170958 + ... + 171173459.

It is an arithmetic number, because the mean of its divisors is an integer number (51922236730).

Almost surely, 2^428272865667 is an apocalyptic number.

428272865667 is a deficient number, since it is larger than the sum of its proper divisors (194793975093).

428272865667 is a wasteful number, since it uses less digits than its factorization.

428272865667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342344562 (or 342344559 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 428272865667 in words is "four hundred twenty-eight billion, two hundred seventy-two million, eight hundred sixty-five thousand, six hundred sixty-seven".