398396741 has 4 divisors (see below), whose sum is σ = 398973984. Its totient is φ = 397819500.

The previous prime is 398396737. The next prime is 398396743. The reversal of 398396741 is 147693893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 398396741 - 2² = 398396737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398396741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398396743) 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, 287585 + ... + 288966.

It is an arithmetic number, because the mean of its divisors is an integer number (99743496).

Almost surely, 2^398396741 is an apocalyptic number.

It is an amenable number.

398396741 is a deficient number, since it is larger than the sum of its proper divisors (577243).

398396741 is an equidigital number, since it uses as much as digits as its factorization.

398396741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577242.

The product of its digits is 979776, while the sum is 50.

The square root of 398396741 is about 19959.8782811920. The cubic root of 398396741 is about 735.8205721294.

The spelling of 398396741 in words is "three hundred ninety-eight million, three hundred ninety-six thousand, seven hundred forty-one".