428665566824 has 16 divisors (see below), whose sum is σ = 876815932320. Its totient is φ = 194847984880.

The previous prime is 428665566811. The next prime is 428665566871.

It is a happy number.

428665566824 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2435599724 + ... + 2435599899.

It is an arithmetic number, because the mean of its divisors is an integer number (54800995770).

Almost surely, 2^428665566824 is an apocalyptic number.

428665566824 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

428665566824 is an abundant number, since it is smaller than the sum of its proper divisors (448150365496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428665566824 is a wasteful number, since it uses less digits than its factorization.

428665566824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871199640 (or 4871199636 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 62.

The spelling of 428665566824 in words is "four hundred twenty-eight billion, six hundred sixty-five million, five hundred sixty-six thousand, eight hundred twenty-four".