398227129 has 16 divisors (see below), whose sum is σ = 420492672. Its totient is φ = 376409088.

The previous prime is 398227121. The next prime is 398227139. The reversal of 398227129 is 921722893.

It is a cyclic number.

It is not a de Polignac number, because 398227129 - 2³ = 398227121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398227121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1256079 + ... + 1256395.

It is an arithmetic number, because the mean of its divisors is an integer number (26280792).

Almost surely, 2^398227129 is an apocalyptic number.

It is an amenable number.

398227129 is a deficient number, since it is larger than the sum of its proper divisors (22265543).

398227129 is a wasteful number, since it uses less digits than its factorization.

398227129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its digits is 108864, while the sum is 43.

The square root of 398227129 is about 19955.6290053709. The cubic root of 398227129 is about 735.7161354365.

The spelling of 398227129 in words is "three hundred ninety-eight million, two hundred twenty-seven thousand, one hundred twenty-nine".