398989423 has 8 divisors (see below), whose sum is σ = 459579392. Its totient is φ = 339297336.

The previous prime is 398989391. The next prime is 398989427. The reversal of 398989423 is 324989893.

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 398989423 - 2⁵ = 398989391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398989427) 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, 223515 + ... + 225292.

It is an arithmetic number, because the mean of its divisors is an integer number (57447424).

Almost surely, 2^398989423 is an apocalyptic number.

398989423 is a deficient number, since it is larger than the sum of its proper divisors (60589969).

398989423 is a wasteful number, since it uses less digits than its factorization.

398989423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448941.

The product of its digits is 3359232, while the sum is 55.

The square root of 398989423 is about 19974.7195975313. The cubic root of 398989423 is about 736.1852768579.

The spelling of 398989423 in words is "three hundred ninety-eight million, nine hundred eighty-nine thousand, four hundred twenty-three".