400044668 has 6 divisors (see below), whose sum is σ = 700078176. Its totient is φ = 200022332.

The previous prime is 400044661. The next prime is 400044691. The reversal of 400044668 is 866440004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400044661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005580 + ... + 50005587.

It is an arithmetic number, because the mean of its divisors is an integer number (116679696).

Almost surely, 2^400044668 is an apocalyptic number.

It is an amenable number.

400044668 is a deficient number, since it is larger than the sum of its proper divisors (300033508).

400044668 is a wasteful number, since it uses less digits than its factorization.

400044668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100011171 (or 100011169 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 400044668 is about 20001.1166688263. The cubic root of 400044668 is about 736.8337250937.

The spelling of 400044668 in words is "four hundred million, forty-four thousand, six hundred sixty-eight".