400270439 has 2 divisors, whose sum is σ = 400270440. Its totient is φ = 400270438.

The previous prime is 400270319. The next prime is 400270501. The reversal of 400270439 is 934072004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400270439 - 2⁸ = 400270183 is a prime.

It is a Sophie Germain 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 (400270139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200135219 + 200135220.

It is an arithmetic number, because the mean of its divisors is an integer number (200135220).

Almost surely, 2^400270439 is an apocalyptic number.

400270439 is a deficient number, since it is larger than the sum of its proper divisors (1).

400270439 is an equidigital number, since it uses as much as digits as its factorization.

400270439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 400270439 is about 20006.7598326166. The cubic root of 400270439 is about 736.9723132857.

The spelling of 400270439 in words is "four hundred million, two hundred seventy thousand, four hundred thirty-nine".