398799229 has 4 divisors (see below), whose sum is σ = 398843676. Its totient is φ = 398754784.

The previous prime is 398799199. The next prime is 398799241. The reversal of 398799229 is 922997893.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 342324004 + 56475225 = 18502^2 + 7515^2 .

It is a cyclic number.

It is not a de Polignac number, because 398799229 - 2⁵ = 398799197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398799259) 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, 3514 + ... + 28459.

It is an arithmetic number, because the mean of its divisors is an integer number (99710919).

Almost surely, 2^398799229 is an apocalyptic number.

It is an amenable number.

398799229 is a deficient number, since it is larger than the sum of its proper divisors (44447).

398799229 is a wasteful number, since it uses less digits than its factorization.

398799229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44446.

The product of its digits is 4408992, while the sum is 58.

The square root of 398799229 is about 19969.9581621995. The cubic root of 398799229 is about 736.0682810441.

The spelling of 398799229 in words is "three hundred ninety-eight million, seven hundred ninety-nine thousand, two hundred twenty-nine".