398332927 has 4 divisors (see below), whose sum is σ = 400334800. Its totient is φ = 396331056.

The previous prime is 398332897. The next prime is 398332937. The reversal of 398332927 is 729233893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 729233893 = 139 ⋅5246287.

It is a cyclic number.

It is not a de Polignac number, because 398332927 - 2⁷ = 398332799 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 (398332937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000638 + ... + 1001035.

It is an arithmetic number, because the mean of its divisors is an integer number (100083700).

Almost surely, 2^398332927 is an apocalyptic number.

398332927 is a deficient number, since it is larger than the sum of its proper divisors (2001873).

398332927 is a wasteful number, since it uses less digits than its factorization.

398332927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001872.

The product of its digits is 489888, while the sum is 46.

The square root of 398332927 is about 19958.2796603314. The cubic root of 398332927 is about 735.7812828511.

The spelling of 398332927 in words is "three hundred ninety-eight million, three hundred thirty-two thousand, nine hundred twenty-seven".