402340430134423 has 32 divisors (see below), whose sum is σ = 443212406208000. Its totient is φ = 362203049779200.

The previous prime is 402340430134373. The next prime is 402340430134451. The reversal of 402340430134423 is 324431034043204.

It is a cyclic number.

It is not a de Polignac number, because 402340430134423 - 2³⁷ = 402202991180951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402340430134453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1196564878 + ... + 1196901076.

It is an arithmetic number, because the mean of its divisors is an integer number (13850387694000).

Almost surely, 2^{402340430134423} is an apocalyptic number.

402340430134423 is a deficient number, since it is larger than the sum of its proper divisors (40871976073577).

402340430134423 is a wasteful number, since it uses less digits than its factorization.

402340430134423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338983.

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 402340430134423 its reverse (324431034043204), we get a palindrome (726771464177627).

The spelling of 402340430134423 in words is "four hundred two trillion, three hundred forty billion, four hundred thirty million, one hundred thirty-four thousand, four hundred twenty-three".