402440420399 has 2 divisors, whose sum is σ = 402440420400. Its totient is φ = 402440420398.

The previous prime is 402440420381. The next prime is 402440420461. The reversal of 402440420399 is 993024044204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402440420399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402440420299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201220210199 + 201220210200.

It is an arithmetic number, because the mean of its divisors is an integer number (201220210200).

Almost surely, 2^402440420399 is an apocalyptic number.

402440420399 is a deficient number, since it is larger than the sum of its proper divisors (1).

402440420399 is an equidigital number, since it uses as much as digits as its factorization.

402440420399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 402440420399 in words is "four hundred two billion, four hundred forty million, four hundred twenty thousand, three hundred ninety-nine".