398288441 has 2 divisors, whose sum is σ = 398288442. Its totient is φ = 398288440.

The previous prime is 398288437. The next prime is 398288477. The reversal of 398288441 is 144882893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279391225 + 118897216 = 16715^2 + 10904^2 .

It is an emirp because it is prime and its reverse (144882893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398288441 - 2² = 398288437 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398288141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199144220 + 199144221.

It is an arithmetic number, because the mean of its divisors is an integer number (199144221).

Almost surely, 2^398288441 is an apocalyptic number.

It is an amenable number.

398288441 is a deficient number, since it is larger than the sum of its proper divisors (1).

398288441 is an equidigital number, since it uses as much as digits as its factorization.

398288441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 47.

The square root of 398288441 is about 19957.1651544001. The cubic root of 398288441 is about 735.7538910368.

The spelling of 398288441 in words is "three hundred ninety-eight million, two hundred eighty-eight thousand, four hundred forty-one".