398830787844 has 12 divisors (see below), whose sum is σ = 930605171664. Its totient is φ = 132943595944.

The previous prime is 398830787819. The next prime is 398830787933. The reversal of 398830787844 is 448787038893.

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

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, 16617949482 + ... + 16617949505.

It is an arithmetic number, because the mean of its divisors is an integer number (77550430972).

Almost surely, 2^398830787844 is an apocalyptic number.

It is an amenable number.

398830787844 is an abundant number, since it is smaller than the sum of its proper divisors (531774383820).

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

398830787844 is a wasteful number, since it uses less digits than its factorization.

398830787844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33235898994 (or 33235898992 counting only the distinct ones).

The product of its (nonzero) digits is 260112384, while the sum is 69.

The spelling of 398830787844 in words is "three hundred ninety-eight billion, eight hundred thirty million, seven hundred eighty-seven thousand, eight hundred forty-four".