404240021434 has 4 divisors (see below), whose sum is σ = 606360032154. Its totient is φ = 202120010716.

The previous prime is 404240021431. The next prime is 404240021443. The reversal of 404240021434 is 434120042404.

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

It can be written as a sum of positive squares in only one way, i.e., 403927615809 + 312405625 = 635553^2 + 17675^2 .

It is not an unprimeable number, because it can be changed into a prime (404240021431) 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 as a sum of consecutive naturals, namely, 101060005357 + ... + 101060005360.

Almost surely, 2^404240021434 is an apocalyptic number.

404240021434 is a deficient number, since it is larger than the sum of its proper divisors (202120010720).

404240021434 is a wasteful number, since it uses less digits than its factorization.

404240021434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202120010719.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 404240021434 its reverse (434120042404), we get a palindrome (838360063838).

The spelling of 404240021434 in words is "four hundred four billion, two hundred forty million, twenty-one thousand, four hundred thirty-four".