398678271 has 16 divisors (see below), whose sum is σ = 566899200. Its totient is φ = 248347008.

The previous prime is 398678263. The next prime is 398678333. The reversal of 398678271 is 172876893.

It is not a de Polignac number, because 398678271 - 2³ = 398678263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398678201) 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 15 ways as a sum of consecutive naturals, for example, 21031 + ... + 35208.

It is an arithmetic number, because the mean of its divisors is an integer number (35431200).

Almost surely, 2^398678271 is an apocalyptic number.

398678271 is a deficient number, since it is larger than the sum of its proper divisors (168220929).

398678271 is a wasteful number, since it uses less digits than its factorization.

398678271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56398.

The product of its digits is 1016064, while the sum is 51.

The square root of 398678271 is about 19966.9294334407. The cubic root of 398678271 is about 735.9938556661.

The spelling of 398678271 in words is "three hundred ninety-eight million, six hundred seventy-eight thousand, two hundred seventy-one".