8440401217 has 8 divisors (see below), whose sum is σ = 9171234560. Its totient is φ = 7738228080.

The previous prime is 8440401199. The next prime is 8440401227. The reversal of 8440401217 is 7121040448.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8440401217 - 2¹⁵ = 8440368449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8440401227) 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 7 ways as a sum of consecutive naturals, for example, 7164438 + ... + 7165615.

It is an arithmetic number, because the mean of its divisors is an integer number (1146404320).

Almost surely, 2^8440401217 is an apocalyptic number.

It is an amenable number.

8440401217 is a deficient number, since it is larger than the sum of its proper divisors (730833343).

8440401217 is a wasteful number, since it uses less digits than its factorization.

8440401217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14330103.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 8440401217 is about 91871.6562221450. The cubic root of 8440401217 is about 2036.0465224341.

The spelling of 8440401217 in words is "eight billion, four hundred forty million, four hundred one thousand, two hundred seventeen".