400440107 has 2 divisors, whose sum is σ = 400440108. Its totient is φ = 400440106.

The previous prime is 400440077. The next prime is 400440109. The reversal of 400440107 is 701044004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400440107 - 2⁶ = 400440043 is a prime.

Together with 400440109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400440109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200220053 + 200220054.

It is an arithmetic number, because the mean of its divisors is an integer number (200220054).

Almost surely, 2^400440107 is an apocalyptic number.

400440107 is a deficient number, since it is larger than the sum of its proper divisors (1).

400440107 is an equidigital number, since it uses as much as digits as its factorization.

400440107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 400440107 is about 20010.9996501924. Note that the first 3 decimals coincide. The cubic root of 400440107 is about 737.0764286894.

The spelling of 400440107 in words is "four hundred million, four hundred forty thousand, one hundred seven".