398331647 has 16 divisors (see below), whose sum is σ = 464589312. Its totient is φ = 334458720.

The previous prime is 398331629. The next prime is 398331649. The reversal of 398331647 is 746133893.

It is a cyclic number.

It is not a de Polignac number, because 398331647 - 2⁸ = 398331391 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398331598 and 398331607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398331649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110528 + ... + 114074.

It is an arithmetic number, because the mean of its divisors is an integer number (29036832).

Almost surely, 2^398331647 is an apocalyptic number.

398331647 is a deficient number, since it is larger than the sum of its proper divisors (66257665).

398331647 is a wasteful number, since it uses less digits than its factorization.

398331647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878.

The product of its digits is 326592, while the sum is 44.

The square root of 398331647 is about 19958.2475934136. The cubic root of 398331647 is about 735.7804947323.

The spelling of 398331647 in words is "three hundred ninety-eight million, three hundred thirty-one thousand, six hundred forty-seven".