398320817191 has 8 divisors (see below), whose sum is σ = 435102810768. Its totient is φ = 361633992000.

The previous prime is 398320817159. The next prime is 398320817207. The reversal of 398320817191 is 191718023893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398320817191 - 2⁵ = 398320817159 is a prime.

It is a super-2 number, since 2×398320817191² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398320817101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23783340 + ... + 23800081.

It is an arithmetic number, because the mean of its divisors is an integer number (54387851346).

Almost surely, 2^398320817191 is an apocalyptic number.

398320817191 is a deficient number, since it is larger than the sum of its proper divisors (36781993577).

398320817191 is a wasteful number, since it uses less digits than its factorization.

398320817191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47584193.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 398320817191 in words is "three hundred ninety-eight billion, three hundred twenty million, eight hundred seventeen thousand, one hundred ninety-one".