398644349 has 12 divisors (see below), whose sum is σ = 422049600. Its totient is φ = 376445784.

The previous prime is 398644307. The next prime is 398644361. The reversal of 398644349 is 943446893.

It is a de Polignac number, because none of the positive numbers 2^k-398644349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398644297 and 398644306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398644049) 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 11 ways as a sum of consecutive naturals, for example, 37022 + ... + 46560.

It is an arithmetic number, because the mean of its divisors is an integer number (35170800).

Almost surely, 2^398644349 is an apocalyptic number.

It is an amenable number.

398644349 is a deficient number, since it is larger than the sum of its proper divisors (23405251).

398644349 is an equidigital number, since it uses as much as digits as its factorization.

398644349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9664 (or 9641 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 50.

The square root of 398644349 is about 19966.0799607735. The cubic root of 398644349 is about 735.9729807789.

The spelling of 398644349 in words is "three hundred ninety-eight million, six hundred forty-four thousand, three hundred forty-nine".