400404457356 has 24 divisors (see below), whose sum is σ = 934907950704. Its totient is φ = 133378026240.

The previous prime is 400404457351. The next prime is 400404457357. The reversal of 400404457356 is 653754404004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (400404457351) 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 7 ways as a sum of consecutive naturals, for example, 11247265 + ... + 11282808.

It is an arithmetic number, because the mean of its divisors is an integer number (38954497946).

Almost surely, 2^400404457356 is an apocalyptic number.

It is an amenable number.

400404457356 is an abundant number, since it is smaller than the sum of its proper divisors (534503493348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400404457356 is a wasteful number, since it uses less digits than its factorization.

400404457356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22531561 (or 22531559 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 42.

The spelling of 400404457356 in words is "four hundred billion, four hundred four million, four hundred fifty-seven thousand, three hundred fifty-six".