388683820428 has 12 divisors (see below), whose sum is σ = 906928914360. Its totient is φ = 129561273472.

The previous prime is 388683820409. The next prime is 388683820493. The reversal of 388683820428 is 824028386883.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×388683820428² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16195159173 + ... + 16195159196.

It is an arithmetic number, because the mean of its divisors is an integer number (75577409530).

Almost surely, 2^388683820428 is an apocalyptic number.

It is an amenable number.

388683820428 is an abundant number, since it is smaller than the sum of its proper divisors (518245093932).

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

388683820428 is a wasteful number, since it uses less digits than its factorization.

388683820428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32390318376 (or 32390318374 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 60.

The spelling of 388683820428 in words is "three hundred eighty-eight billion, six hundred eighty-three million, eight hundred twenty thousand, four hundred twenty-eight".