428564726979 has 32 divisors (see below), whose sum is σ = 592180787520. Its totient is φ = 275494348800.

The previous prime is 428564726963. The next prime is 428564726987. The reversal of 428564726979 is 979627465824.

It is not a de Polignac number, because 428564726979 - 2⁴ = 428564726963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428564721979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31925689 + ... + 31939109.

It is an arithmetic number, because the mean of its divisors is an integer number (18505649610).

Almost surely, 2^428564726979 is an apocalyptic number.

428564726979 is a deficient number, since it is larger than the sum of its proper divisors (163616060541).

428564726979 is a wasteful number, since it uses less digits than its factorization.

428564726979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16471.

The product of its digits is 365783040, while the sum is 69.

The spelling of 428564726979 in words is "four hundred twenty-eight billion, five hundred sixty-four million, seven hundred twenty-six thousand, nine hundred seventy-nine".