400043607866 has 32 divisors (see below), whose sum is σ = 717314088960. Its totient is φ = 163601585136.

The previous prime is 400043607833. The next prime is 400043607893. The reversal of 400043607866 is 668706340004.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1347626 + ... + 1617461.

It is an arithmetic number, because the mean of its divisors is an integer number (22416065280).

Almost surely, 2^400043607866 is an apocalyptic number.

400043607866 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

400043607866 is a deficient number, since it is larger than the sum of its proper divisors (317270481094).

400043607866 is a wasteful number, since it uses less digits than its factorization.

400043607866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965538.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 400043607866 in words is "four hundred billion, forty-three million, six hundred seven thousand, eight hundred sixty-six".