400424447 has 2 divisors, whose sum is σ = 400424448. Its totient is φ = 400424446.

The previous prime is 400424441. The next prime is 400424483. The reversal of 400424447 is 744424004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400424447 - 2⁶ = 400424383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400424441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200212223 + 200212224.

It is an arithmetic number, because the mean of its divisors is an integer number (200212224).

Almost surely, 2^400424447 is an apocalyptic number.

400424447 is a deficient number, since it is larger than the sum of its proper divisors (1).

400424447 is an equidigital number, since it uses as much as digits as its factorization.

400424447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 29.

The square root of 400424447 is about 20010.6083615666. The cubic root of 400424447 is about 737.0668202884.

The spelling of 400424447 in words is "four hundred million, four hundred twenty-four thousand, four hundred forty-seven".