400304447 has 2 divisors, whose sum is σ = 400304448. Its totient is φ = 400304446.

The previous prime is 400304419. The next prime is 400304459. The reversal of 400304447 is 744403004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400304447 - 2⁶ = 400304383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400304497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200152223 + 200152224.

It is an arithmetic number, because the mean of its divisors is an integer number (200152224).

Almost surely, 2^400304447 is an apocalyptic number.

400304447 is a deficient number, since it is larger than the sum of its proper divisors (1).

400304447 is an equidigital number, since it uses as much as digits as its factorization.

400304447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 400304447 is about 20007.6097273013. The cubic root of 400304447 is about 736.9931843786.

The spelling of 400304447 in words is "four hundred million, three hundred four thousand, four hundred forty-seven".