402326643 has 8 divisors (see below), whose sum is σ = 536536000. Its totient is φ = 268167528.

The previous prime is 402326621. The next prime is 402326651. The reversal of 402326643 is 346623204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402326643 - 2⁵ = 402326611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402326643.

It is not an unprimeable number, because it can be changed into a prime (402322643) 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 in 7 ways as a sum of consecutive naturals, for example, 14388 + ... + 31806.

It is an arithmetic number, because the mean of its divisors is an integer number (67067000).

Almost surely, 2^402326643 is an apocalyptic number.

402326643 is a deficient number, since it is larger than the sum of its proper divisors (134209357).

402326643 is a wasteful number, since it uses less digits than its factorization.

402326643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25121.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 402326643 is about 20058.0817377934. The cubic root of 402326643 is about 738.2321098481.

Adding to 402326643 its reverse (346623204), we get a palindrome (748949847).

The spelling of 402326643 in words is "four hundred two million, three hundred twenty-six thousand, six hundred forty-three".