400818217287 has 8 divisors (see below), whose sum is σ = 536312715904. Its totient is φ = 266267931768.

The previous prime is 400818217231. The next prime is 400818217291. The reversal of 400818217287 is 782712818004.

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

It is not a de Polignac number, because 400818217287 - 2¹⁰ = 400818216263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400818217687) 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, 236052283 + ... + 236053980.

It is an arithmetic number, because the mean of its divisors is an integer number (67039089488).

Almost surely, 2^400818217287 is an apocalyptic number.

400818217287 is a deficient number, since it is larger than the sum of its proper divisors (135494498617).

400818217287 is a wasteful number, since it uses less digits than its factorization.

400818217287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472106549.

The product of its (nonzero) digits is 401408, while the sum is 48.

The spelling of 400818217287 in words is "four hundred billion, eight hundred eighteen million, two hundred seventeen thousand, two hundred eighty-seven".