400446007 has 12 divisors (see below), whose sum is σ = 448576920. Its totient is φ = 356891808.

The previous prime is 400446001. The next prime is 400446017. The reversal of 400446007 is 700644004.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-400446007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400446001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35953 + ... + 45754.

It is an arithmetic number, because the mean of its divisors is an integer number (37381410).

Almost surely, 2^400446007 is an apocalyptic number.

400446007 is a deficient number, since it is larger than the sum of its proper divisors (48130913).

400446007 is a wasteful number, since it uses less digits than its factorization.

400446007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81762 (or 81749 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 400446007 is about 20011.1470685716. The cubic root of 400446007 is about 737.0800486478.

The spelling of 400446007 in words is "four hundred million, four hundred forty-six thousand, seven".