400800067 has 4 divisors (see below), whose sum is σ = 409327776. Its totient is φ = 392272360.

The previous prime is 400800031. The next prime is 400800077. The reversal of 400800067 is 760008004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400800067 - 2¹¹ = 400798019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400800077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4263784 + ... + 4263877.

It is an arithmetic number, because the mean of its divisors is an integer number (102331944).

Almost surely, 2^400800067 is an apocalyptic number.

400800067 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

400800067 is a deficient number, since it is larger than the sum of its proper divisors (8527709).

400800067 is an equidigital number, since it uses as much as digits as its factorization.

400800067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527708.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 400800067 is about 20019.9916833150. The cubic root of 400800067 is about 737.2972179054.

The spelling of 400800067 in words is "four hundred million, eight hundred thousand, sixty-seven".