402400039 has 2 divisors, whose sum is σ = 402400040. Its totient is φ = 402400038.

The previous prime is 402399997. The next prime is 402400067. The reversal of 402400039 is 930004204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402400039 - 2¹¹ = 402397991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402399992 and 402400019.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402400079) 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, 201200019 + 201200020.

It is an arithmetic number, because the mean of its divisors is an integer number (201200020).

Almost surely, 2^402400039 is an apocalyptic number.

402400039 is a deficient number, since it is larger than the sum of its proper divisors (1).

402400039 is an equidigital number, since it uses as much as digits as its factorization.

402400039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 402400039 is about 20059.9112410798. The cubic root of 402400039 is about 738.2769987382.

The spelling of 402400039 in words is "four hundred two million, four hundred thousand, thirty-nine".