398178341 has 4 divisors (see below), whose sum is σ = 434376384. Its totient is φ = 361980300.

The previous prime is 398178331. The next prime is 398178343. The reversal of 398178341 is 143871893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 398178341 - 2²² = 393984037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398178292 and 398178301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398178343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18099005 + ... + 18099026.

It is an arithmetic number, because the mean of its divisors is an integer number (108594096).

Almost surely, 2^398178341 is an apocalyptic number.

It is an amenable number.

398178341 is a deficient number, since it is larger than the sum of its proper divisors (36198043).

398178341 is a wasteful number, since it uses less digits than its factorization.

398178341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36198042.

The product of its digits is 145152, while the sum is 44.

The square root of 398178341 is about 19954.4065559465. The cubic root of 398178341 is about 735.6860892793.

The spelling of 398178341 in words is "three hundred ninety-eight million, one hundred seventy-eight thousand, three hundred forty-one".