398398609 has 8 divisors (see below), whose sum is σ = 455605568. Its totient is φ = 341264880.

The previous prime is 398398591. The next prime is 398398613. The reversal of 398398609 is 906893893.

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 398398609 - 2⁹ = 398398097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398398609.

It is not an unprimeable number, because it can be changed into a prime (398398699) 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, 6102 + ... + 28879.

It is an arithmetic number, because the mean of its divisors is an integer number (56950696).

Almost surely, 2^398398609 is an apocalyptic number.

It is an amenable number.

398398609 is a deficient number, since it is larger than the sum of its proper divisors (57206959).

398398609 is a wasteful number, since it uses less digits than its factorization.

398398609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36615.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 398398609 is about 19959.9250750097. The cubic root of 398398609 is about 735.8217221645.

The spelling of 398398609 in words is "three hundred ninety-eight million, three hundred ninety-eight thousand, six hundred nine".