398834745 has 8 divisors (see below), whose sum is σ = 638135616. Its totient is φ = 212711856.

The previous prime is 398834741. The next prime is 398834753. The reversal of 398834745 is 547438893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398834745 - 2² = 398834741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398834741) 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 7 ways as a sum of consecutive naturals, for example, 13294477 + ... + 13294506.

It is an arithmetic number, because the mean of its divisors is an integer number (79766952).

Almost surely, 2^398834745 is an apocalyptic number.

It is an amenable number.

398834745 is a deficient number, since it is larger than the sum of its proper divisors (239300871).

398834745 is a wasteful number, since it uses less digits than its factorization.

398834745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26588991.

The product of its digits is 2903040, while the sum is 51.

The square root of 398834745 is about 19970.8473781159. The cubic root of 398834745 is about 736.0901311574.

The spelling of 398834745 in words is "three hundred ninety-eight million, eight hundred thirty-four thousand, seven hundred forty-five".