400404040407 has 48 divisors (see below), whose sum is σ = 664798417920. Its totient is φ = 227485129536.

The previous prime is 400404040403. The next prime is 400404040423. The reversal of 400404040407 is 704040404004.

It is a happy number.

It is not a de Polignac number, because 400404040407 - 2² = 400404040403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400404040403) 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 47 ways as a sum of consecutive naturals, for example, 9660973 + ... + 9702329.

It is an arithmetic number, because the mean of its divisors is an integer number (13849967040).

Almost surely, 2^400404040407 is an apocalyptic number.

400404040407 is a deficient number, since it is larger than the sum of its proper divisors (264394377513).

400404040407 is a wasteful number, since it uses less digits than its factorization.

400404040407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42252 (or 42249 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The spelling of 400404040407 in words is "four hundred billion, four hundred four million, forty thousand, four hundred seven".