400478774850 has 144 divisors (see below), whose sum is σ = 1341447981120. Its totient is φ = 83216361600.

The previous prime is 400478774831. The next prime is 400478774903. The reversal of 400478774850 is 58477874004.

400478774850 is a `hidden beast` number, since 40 + 0 + 47 + 87 + 7 + 485 + 0 = 666.

It is a Curzon 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 71 ways as a sum of consecutive naturals, for example, 5744265 + ... + 5813564.

It is an arithmetic number, because the mean of its divisors is an integer number (9315610980).

Almost surely, 2^400478774850 is an apocalyptic number.

400478774850 is an abundant number, since it is smaller than the sum of its proper divisors (940969206270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400478774850 is a wasteful number, since it uses less digits than its factorization.

400478774850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11557865 (or 11557857 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 54.

The spelling of 400478774850 in words is "four hundred billion, four hundred seventy-eight million, seven hundred seventy-four thousand, eight hundred fifty".