398915271 has 24 divisors (see below), whose sum is σ = 597258480. Its totient is φ = 256265856.

The previous prime is 398915269. The next prime is 398915303. The reversal of 398915271 is 172519893.

398915271 is a `hidden beast` number, since 39 + 8 + 91 + 527 + 1 = 666.

It is not a de Polignac number, because 398915271 - 2¹ = 398915269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398915771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166635 + ... + 169011.

It is an arithmetic number, because the mean of its divisors is an integer number (24885770).

Almost surely, 2^398915271 is an apocalyptic number.

398915271 is a deficient number, since it is larger than the sum of its proper divisors (198343209).

398915271 is a wasteful number, since it uses less digits than its factorization.

398915271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055 (or 3052 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 398915271 is about 19972.8633650761. The cubic root of 398915271 is about 736.1396674677.

The spelling of 398915271 in words is "three hundred ninety-eight million, nine hundred fifteen thousand, two hundred seventy-one".