398231279 has 8 divisors (see below), whose sum is σ = 424934640. Its totient is φ = 372102336.

The previous prime is 398231263. The next prime is 398231287. The reversal of 398231279 is 972132893.

It is a happy number.

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 398231279 - 2⁴ = 398231263 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 (398234279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142172 + ... + 144945.

It is an arithmetic number, because the mean of its divisors is an integer number (53116830).

Almost surely, 2^398231279 is an apocalyptic number.

398231279 is a deficient number, since it is larger than the sum of its proper divisors (26703361).

398231279 is a wasteful number, since it uses less digits than its factorization.

398231279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287209.

The product of its digits is 163296, while the sum is 44.

The square root of 398231279 is about 19955.7329857863. The cubic root of 398231279 is about 735.7186911065.

The spelling of 398231279 in words is "three hundred ninety-eight million, two hundred thirty-one thousand, two hundred seventy-nine".