400042864687 has 8 divisors (see below), whose sum is σ = 407990889360. Its totient is φ = 392109656640.

The previous prime is 400042864679. The next prime is 400042864691. The reversal of 400042864687 is 786468240004.

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 400042864687 - 2³ = 400042864679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400042864687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400042864657) 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 in 7 ways as a sum of consecutive naturals, for example, 3649614 + ... + 3757627.

It is an arithmetic number, because the mean of its divisors is an integer number (50998861170).

Almost surely, 2^400042864687 is an apocalyptic number.

400042864687 is a deficient number, since it is larger than the sum of its proper divisors (7948024673).

400042864687 is a wasteful number, since it uses less digits than its factorization.

400042864687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7408313.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 400042864687 in words is "four hundred billion, forty-two million, eight hundred sixty-four thousand, six hundred eighty-seven".