400422000394 has 64 divisors (see below), whose sum is σ = 716297904000. Its totient is φ = 166180412160.

The previous prime is 400422000383. The next prime is 400422000397. The reversal of 400422000394 is 493000224004.

It is not an unprimeable number, because it can be changed into a prime (400422000397) 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 31 ways as a sum of consecutive naturals, for example, 608364 + ... + 1082104.

It is an arithmetic number, because the mean of its divisors is an integer number (11192154750).

Almost surely, 2^400422000394 is an apocalyptic number.

400422000394 is a deficient number, since it is larger than the sum of its proper divisors (315875903606).

400422000394 is a wasteful number, since it uses less digits than its factorization.

400422000394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473863.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 400422000394 its reverse (493000224004), we get a palindrome (893422224398).

The spelling of 400422000394 in words is "four hundred billion, four hundred twenty-two million, three hundred ninety-four", and thus it is an aban number.