398823609 has 8 divisors (see below), whose sum is σ = 532180000. Its totient is φ = 265674816.

The previous prime is 398823583. The next prime is 398823619. The reversal of 398823609 is 906328893.

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

It is not a de Polignac number, because 398823609 - 2¹⁷ = 398692537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398823619) 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, 47359 + ... + 55140.

It is an arithmetic number, because the mean of its divisors is an integer number (66522500).

Almost surely, 2^398823609 is an apocalyptic number.

It is an amenable number.

398823609 is a deficient number, since it is larger than the sum of its proper divisors (133356391).

398823609 is a wasteful number, since it uses less digits than its factorization.

398823609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103799.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 398823609 is about 19970.5685697729. The cubic root of 398823609 is about 736.0832802197.

The spelling of 398823609 in words is "three hundred ninety-eight million, eight hundred twenty-three thousand, six hundred nine".