402344489 has 2 divisors, whose sum is σ = 402344490. Its totient is φ = 402344488.

The previous prime is 402344479. The next prime is 402344533. The reversal of 402344489 is 984443204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349054489 + 53290000 = 18683^2 + 7300^2 .

It is a cyclic number.

It is not a de Polignac number, because 402344489 - 2⁸ = 402344233 is a prime.

It is a super-2 number, since 2×402344489² = 323762175657342242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402344479) 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 as a sum of consecutive naturals, namely, 201172244 + 201172245.

It is an arithmetic number, because the mean of its divisors is an integer number (201172245).

Almost surely, 2^402344489 is an apocalyptic number.

It is an amenable number.

402344489 is a deficient number, since it is larger than the sum of its proper divisors (1).

402344489 is an equidigital number, since it uses as much as digits as its factorization.

402344489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 402344489 is about 20058.5265909538. The cubic root of 402344489 is about 738.2430249388.

The spelling of 402344489 in words is "four hundred two million, three hundred forty-four thousand, four hundred eighty-nine".