398991972311 has 8 divisors (see below), whose sum is σ = 426021763200. Its totient is φ = 372769040952.

The previous prime is 398991972251. The next prime is 398991972319. The reversal of 398991972311 is 113279199893.

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

It is not a de Polignac number, because 398991972311 - 2¹⁴ = 398991955927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398991972319) 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, 201713861 + ... + 201715838.

It is an arithmetic number, because the mean of its divisors is an integer number (53252720400).

Almost surely, 2^398991972311 is an apocalyptic number.

398991972311 is a deficient number, since it is larger than the sum of its proper divisors (27029790889).

398991972311 is a wasteful number, since it uses less digits than its factorization.

398991972311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403429765.

The product of its digits is 6613488, while the sum is 62.

The spelling of 398991972311 in words is "three hundred ninety-eight billion, nine hundred ninety-one million, nine hundred seventy-two thousand, three hundred eleven".