402443441 has 2 divisors, whose sum is σ = 402443442. Its totient is φ = 402443440.

The previous prime is 402443429. The next prime is 402443449. The reversal of 402443441 is 144344204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367680625 + 34762816 = 19175^2 + 5896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402443441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402443441.

It is not a weakly prime, because it can be changed into another prime (402443449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201221720 + 201221721.

It is an arithmetic number, because the mean of its divisors is an integer number (201221721).

Almost surely, 2^402443441 is an apocalyptic number.

It is an amenable number.

402443441 is a deficient number, since it is larger than the sum of its proper divisors (1).

402443441 is an equidigital number, since it uses as much as digits as its factorization.

402443441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 402443441 is about 20060.9930212839. The cubic root of 402443441 is about 738.3035407720.

Adding to 402443441 its reverse (144344204), we get a palindrome (546787645).

The spelling of 402443441 in words is "four hundred two million, four hundred forty-three thousand, four hundred forty-one".