400446444 has 24 divisors (see below), whose sum is σ = 956105920. Its totient is φ = 130377744.

The previous prime is 400446443. The next prime is 400446457. The reversal of 400446444 is 444644004.

It is not an unprimeable number, because it can be changed into a prime (400446443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387514 + ... + 388545.

Almost surely, 2^400446444 is an apocalyptic number.

It is an amenable number.

400446444 is an abundant number, since it is smaller than the sum of its proper divisors (555659476).

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

400446444 is a wasteful number, since it uses less digits than its factorization.

400446444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776109 (or 776107 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

The square root of 400446444 is about 20011.1579874829. The cubic root of 400446444 is about 737.0803167687.

The spelling of 400446444 in words is "four hundred million, four hundred forty-six thousand, four hundred forty-four".