428781128084 has 12 divisors (see below), whose sum is σ = 754970453664. Its totient is φ = 213075284184.

The previous prime is 428781128071. The next prime is 428781128107. The reversal of 428781128084 is 480821187824.

It is a super-2 number, since 2×428781128084² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 328819232 + ... + 328820535.

It is an arithmetic number, because the mean of its divisors is an integer number (62914204472).

Almost surely, 2^428781128084 is an apocalyptic number.

It is an amenable number.

428781128084 is a deficient number, since it is larger than the sum of its proper divisors (326189325580).

428781128084 is a wasteful number, since it uses less digits than its factorization.

428781128084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657639934 (or 657639932 counting only the distinct ones).

The product of its (nonzero) digits is 1835008, while the sum is 53.

The spelling of 428781128084 in words is "four hundred twenty-eight billion, seven hundred eighty-one million, one hundred twenty-eight thousand, eighty-four".