402238279 has 2 divisors, whose sum is σ = 402238280. Its totient is φ = 402238278.

The previous prime is 402238273. The next prime is 402238327. The reversal of 402238279 is 972832204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402238279 - 2¹⁷ = 402107207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402238273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201119139 + 201119140.

It is an arithmetic number, because the mean of its divisors is an integer number (201119140).

Almost surely, 2^402238279 is an apocalyptic number.

402238279 is a deficient number, since it is larger than the sum of its proper divisors (1).

402238279 is an equidigital number, since it uses as much as digits as its factorization.

402238279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 402238279 is about 20055.8789136752. The cubic root of 402238279 is about 738.1780593068.

The spelling of 402238279 in words is "four hundred two million, two hundred thirty-eight thousand, two hundred seventy-nine".