398009067 has 8 divisors (see below), whose sum is σ = 537948624. Its totient is φ = 261704448.

The previous prime is 398009057. The next prime is 398009071. The reversal of 398009067 is 760900893.

It is a happy number.

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

It is not a de Polignac number, because 398009067 - 2²⁰ = 396960491 is a prime.

It is a super-2 number, since 2×398009067² = 316822434828420978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398009057) 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, 908478 + ... + 908915.

It is an arithmetic number, because the mean of its divisors is an integer number (67243578).

Almost surely, 2^398009067 is an apocalyptic number.

398009067 is a deficient number, since it is larger than the sum of its proper divisors (139939557).

398009067 is a wasteful number, since it uses less digits than its factorization.

398009067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817469.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 398009067 is about 19950.1645857873. The cubic root of 398009067 is about 735.5818226182.

The spelling of 398009067 in words is "three hundred ninety-eight million, nine thousand, sixty-seven".