428597889867 has 64 divisors (see below), whose sum is σ = 741484800000. Its totient is φ = 239601608064.

The previous prime is 428597889857. The next prime is 428597889871. The reversal of 428597889867 is 768988795824.

428597889867 is a `hidden beast` number, since 428 + 59 + 7 + 8 + 89 + 8 + 67 = 666.

It is not a de Polignac number, because 428597889867 - 2⁴ = 428597889851 is a prime.

It is a super-2 number, since 2×428597889867² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428597889817) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3434634 + ... + 3557232.

It is an arithmetic number, because the mean of its divisors is an integer number (11585700000).

Almost surely, 2^428597889867 is an apocalyptic number.

428597889867 is a deficient number, since it is larger than the sum of its proper divisors (312886910133).

428597889867 is a wasteful number, since it uses less digits than its factorization.

428597889867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123017 (or 123011 counting only the distinct ones).

The product of its digits is 3901685760, while the sum is 81.

The spelling of 428597889867 in words is "four hundred twenty-eight billion, five hundred ninety-seven million, eight hundred eighty-nine thousand, eight hundred sixty-seven".