398345956 has 12 divisors (see below), whose sum is σ = 700177968. Its totient is φ = 198295112.

The previous prime is 398345929. The next prime is 398345957. The reversal of 398345956 is 659543893.

It is not an unprimeable number, because it can be changed into a prime (398345957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218446 + ... + 220261.

It is an arithmetic number, because the mean of its divisors is an integer number (58348164).

Almost surely, 2^398345956 is an apocalyptic number.

It is an amenable number.

398345956 is a deficient number, since it is larger than the sum of its proper divisors (301832012).

398345956 is a wasteful number, since it uses less digits than its factorization.

398345956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438938 (or 438936 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 52.

The square root of 398345956 is about 19958.6060635506. The cubic root of 398345956 is about 735.7893049428.

The spelling of 398345956 in words is "three hundred ninety-eight million, three hundred forty-five thousand, nine hundred fifty-six".