402040330423 has 4 divisors (see below), whose sum is σ = 402043384800. Its totient is φ = 402037276048.

The previous prime is 402040330421. The next prime is 402040330463. The reversal of 402040330423 is 324033040204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402040330423 - 2¹ = 402040330421 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 (402040330421) 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 in 3 ways as a sum of consecutive naturals, for example, 1320415 + ... + 1596112.

It is an arithmetic number, because the mean of its divisors is an integer number (100510846200).

Almost surely, 2^402040330423 is an apocalyptic number.

402040330423 is a deficient number, since it is larger than the sum of its proper divisors (3054377).

402040330423 is a wasteful number, since it uses less digits than its factorization.

402040330423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054376.

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 402040330423 its reverse (324033040204), we get a palindrome (726073370627).

The spelling of 402040330423 in words is "four hundred two billion, forty million, three hundred thirty thousand, four hundred twenty-three".