398450110871 has 4 divisors (see below), whose sum is σ = 398475072072. Its totient is φ = 398425149672.

The previous prime is 398450110847. The next prime is 398450110901. The reversal of 398450110871 is 178011054893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398450110871 - 2²⁶ = 398383002007 is a prime.

It is a super-2 number, since 2×398450110871² (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 (398450110771) 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, 12456641 + ... + 12488586.

It is an arithmetic number, because the mean of its divisors is an integer number (99618768018).

Almost surely, 2^398450110871 is an apocalyptic number.

398450110871 is a deficient number, since it is larger than the sum of its proper divisors (24961201).

398450110871 is a wasteful number, since it uses less digits than its factorization.

398450110871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24961200.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 398450110871 in words is "three hundred ninety-eight billion, four hundred fifty million, one hundred ten thousand, eight hundred seventy-one".