398401843 has 8 divisors (see below), whose sum is σ = 455462912. Its totient is φ = 341377416.

The previous prime is 398401841. The next prime is 398401847. The reversal of 398401843 is 348104893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398401843 - 2¹ = 398401841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398401796 and 398401805.

It is not an unprimeable number, because it can be changed into a prime (398401841) 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 7 ways as a sum of consecutive naturals, for example, 20596 + ... + 34942.

It is an arithmetic number, because the mean of its divisors is an integer number (56932864).

Almost surely, 2^398401843 is an apocalyptic number.

398401843 is a deficient number, since it is larger than the sum of its proper divisors (57061069).

398401843 is a wasteful number, since it uses less digits than its factorization.

398401843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18321.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 398401843 is about 19960.0060871734. The cubic root of 398401843 is about 735.8237131696.

The spelling of 398401843 in words is "three hundred ninety-eight million, four hundred one thousand, eight hundred forty-three".