400278044318 has 8 divisors (see below), whose sum is σ = 619785359040. Its totient is φ = 193682924640.

The previous prime is 400278044317. The next prime is 400278044381. The reversal of 400278044318 is 813440872004.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400278044311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3228048683 + ... + 3228048806.

It is an arithmetic number, because the mean of its divisors is an integer number (77473169880).

Almost surely, 2^400278044318 is an apocalyptic number.

400278044318 is a deficient number, since it is larger than the sum of its proper divisors (219507314722).

400278044318 is a wasteful number, since it uses less digits than its factorization.

400278044318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456097522.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 400278044318 in words is "four hundred billion, two hundred seventy-eight million, forty-four thousand, three hundred eighteen".