398667 has 8 divisors (see below), whose sum is σ = 562896. Its totient is φ = 250112.

The previous prime is 398627. The next prime is 398669. The reversal of 398667 is 766893.

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 398667 - 2⁷ = 398539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398669) 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, 3858 + ... + 3959.

It is an arithmetic number, because the mean of its divisors is an integer number (70362).

2³⁹⁸⁶⁶⁷ is an apocalyptic number.

398667 is a deficient number, since it is larger than the sum of its proper divisors (164229).

398667 is a wasteful number, since it uses less digits than its factorization.

398667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7837.

The product of its digits is 54432, while the sum is 39.

The square root of 398667 is about 631.4008235661. The cubic root of 398667 is about 73.5986919860.

The spelling of 398667 in words is "three hundred ninety-eight thousand, six hundred sixty-seven".