398668145 has 8 divisors (see below), whose sum is σ = 478538304. Its totient is φ = 318843504.

The previous prime is 398668141. The next prime is 398668159. The reversal of 398668145 is 541866893.

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 398668145 - 2² = 398668141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 398668093 and 398668102.

It is not an unprimeable number, because it can be changed into a prime (398668141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12422 + ... + 30848.

It is an arithmetic number, because the mean of its divisors is an integer number (59817288).

Almost surely, 2^398668145 is an apocalyptic number.

It is an amenable number.

398668145 is a deficient number, since it is larger than the sum of its proper divisors (79870159).

398668145 is a wasteful number, since it uses less digits than its factorization.

398668145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22759.

The product of its digits is 1244160, while the sum is 50.

The square root of 398668145 is about 19966.6758625466. The cubic root of 398668145 is about 735.9876244621.

The spelling of 398668145 in words is "three hundred ninety-eight million, six hundred sixty-eight thousand, one hundred forty-five".