400424014433421 has 96 divisors (see below), whose sum is σ = 638722039887360. Its totient is φ = 239705903923200.

The previous prime is 400424014433419. The next prime is 400424014433447. The reversal of 400424014433421 is 124334410424004.

400424014433421 is a `hidden beast` number, since 40 + 0 + 4 + 24 + 0 + 144 + 33 + 421 = 666.

It is not a de Polignac number, because 400424014433421 - 2¹ = 400424014433419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400424014433221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 65418068241 + ... + 65418074361.

It is an arithmetic number, because the mean of its divisors is an integer number (6653354582160).

Almost surely, 2^{400424014433421} is an apocalyptic number.

It is an amenable number.

400424014433421 is a deficient number, since it is larger than the sum of its proper divisors (238298025453939).

400424014433421 is a wasteful number, since it uses less digits than its factorization.

400424014433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12707 (or 12704 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

Adding to 400424014433421 its reverse (124334410424004), we get a palindrome (524758424857425).

The spelling of 400424014433421 in words is "four hundred trillion, four hundred twenty-four billion, fourteen million, four hundred thirty-three thousand, four hundred twenty-one".