398981620844 has 12 divisors (see below), whose sum is σ = 734966143800. Its totient is φ = 188991294048.

The previous prime is 398981620841. The next prime is 398981620889. The reversal of 398981620844 is 448026189893.

It is not an unprimeable number, because it can be changed into a prime (398981620841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624879009 + ... + 2624879160.

It is an arithmetic number, because the mean of its divisors is an integer number (61247178650).

Almost surely, 2^398981620844 is an apocalyptic number.

It is an amenable number.

398981620844 is a deficient number, since it is larger than the sum of its proper divisors (335984522956).

398981620844 is a wasteful number, since it uses less digits than its factorization.

398981620844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249758192 (or 5249758190 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 62.

The spelling of 398981620844 in words is "three hundred ninety-eight billion, nine hundred eighty-one million, six hundred twenty thousand, eight hundred forty-four".