398226109 has 4 divisors (see below), whose sum is σ = 400863520. Its totient is φ = 395588700.

The previous prime is 398226107. The next prime is 398226131. The reversal of 398226109 is 901622893.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 901622893 = 137 ⋅6581189.

It is a cyclic number.

It is not a de Polignac number, because 398226109 - 2¹ = 398226107 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 (398226107) 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 3 ways as a sum of consecutive naturals, for example, 1318479 + ... + 1318780.

It is an arithmetic number, because the mean of its divisors is an integer number (100215880).

Almost surely, 2^398226109 is an apocalyptic number.

It is an amenable number.

398226109 is a deficient number, since it is larger than the sum of its proper divisors (2637411).

398226109 is a wasteful number, since it uses less digits than its factorization.

398226109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637410.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 398226109 is about 19955.6034486557. The cubic root of 398226109 is about 735.7155072932.

The spelling of 398226109 in words is "three hundred ninety-eight million, two hundred twenty-six thousand, one hundred nine".