40004243421 has 8 divisors (see below), whose sum is σ = 53340326400. Its totient is φ = 26668828032.

The previous prime is 40004243407. The next prime is 40004243429. The reversal of 40004243421 is 12434240004.

It is a happy number.

40004243421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40004243421 - 2⁹ = 40004242909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40004243391 and 40004243400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004243429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4500 + ... + 282893.

It is an arithmetic number, because the mean of its divisors is an integer number (6667540800).

Almost surely, 2^40004243421 is an apocalyptic number.

It is an amenable number.

40004243421 is a deficient number, since it is larger than the sum of its proper divisors (13336082979).

40004243421 is a wasteful number, since it uses less digits than its factorization.

40004243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333795.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 40004243421 its reverse (12434240004), we get a palindrome (52438483425).

The spelling of 40004243421 in words is "forty billion, four million, two hundred forty-three thousand, four hundred twenty-one".