402326143 has 8 divisors (see below), whose sum is σ = 421497216. Its totient is φ = 383295000.

The previous prime is 402326129. The next prime is 402326201. The reversal of 402326143 is 341623204.

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

It is a de Polignac number, because none of the positive numbers 2^k-402326143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402320143) 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 in 7 ways as a sum of consecutive naturals, for example, 29073 + ... + 40618.

It is an arithmetic number, because the mean of its divisors is an integer number (52687152).

Almost surely, 2^402326143 is an apocalyptic number.

402326143 is a deficient number, since it is larger than the sum of its proper divisors (19171073).

402326143 is a wasteful number, since it uses less digits than its factorization.

402326143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69965.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 402326143 is about 20058.0692739855. The cubic root of 402326143 is about 738.2318040301.

Adding to 402326143 its reverse (341623204), we get a palindrome (743949347).

The spelling of 402326143 in words is "four hundred two million, three hundred twenty-six thousand, one hundred forty-three".