400010443421 has 16 divisors (see below), whose sum is σ = 421910899200. Its totient is φ = 378714173760.

The previous prime is 400010443367. The next prime is 400010443429. The reversal of 400010443421 is 124344010004.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400010443421 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 (400010443429) 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 15 ways as a sum of consecutive naturals, for example, 224606 + ... + 922208.

It is an arithmetic number, because the mean of its divisors is an integer number (26369431200).

Almost surely, 2^400010443421 is an apocalyptic number.

It is an amenable number.

400010443421 is a deficient number, since it is larger than the sum of its proper divisors (21900455779).

400010443421 is a wasteful number, since it uses less digits than its factorization.

400010443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698036.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 400010443421 its reverse (124344010004), we get a palindrome (524354453425).

The spelling of 400010443421 in words is "four hundred billion, ten million, four hundred forty-three thousand, four hundred twenty-one".