399968271 has 12 divisors (see below), whose sum is σ = 577930080. Its totient is φ = 266554080.

The previous prime is 399968269. The next prime is 399968279. The reversal of 399968271 is 172869993.

It is not a de Polignac number, because 399968271 - 2¹ = 399968269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399968279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29706 + ... + 41016.

It is an arithmetic number, because the mean of its divisors is an integer number (48160840).

Almost surely, 2^399968271 is an apocalyptic number.

399968271 is a deficient number, since it is larger than the sum of its proper divisors (177961809).

399968271 is a wasteful number, since it uses less digits than its factorization.

399968271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15246 (or 15243 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 399968271 is about 19999.2067592692. The cubic root of 399968271 is about 736.7868174404.

The spelling of 399968271 in words is "three hundred ninety-nine million, nine hundred sixty-eight thousand, two hundred seventy-one".