398528233 has 2 divisors, whose sum is σ = 398528234. Its totient is φ = 398528232.

The previous prime is 398528231. The next prime is 398528293. The reversal of 398528233 is 332825893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394737424 + 3790809 = 19868^2 + 1947^2 .

It is a cyclic number.

It is not a de Polignac number, because 398528233 - 2¹ = 398528231 is a prime.

Together with 398528231, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 398528233.

It is not a weakly prime, because it can be changed into another prime (398528231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199264116 + 199264117.

It is an arithmetic number, because the mean of its divisors is an integer number (199264117).

Almost surely, 2^398528233 is an apocalyptic number.

It is an amenable number.

398528233 is a deficient number, since it is larger than the sum of its proper divisors (1).

398528233 is an equidigital number, since it uses as much as digits as its factorization.

398528233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 398528233 is about 19963.1719173081. The cubic root of 398528233 is about 735.9015164628.

The spelling of 398528233 in words is "three hundred ninety-eight million, five hundred twenty-eight thousand, two hundred thirty-three".