400222040004 has 36 divisors (see below), whose sum is σ = 1039014879084. Its totient is φ = 129801742272.

The previous prime is 400222039981. The next prime is 400222040017. The reversal of 400222040004 is 400040222004.

400222040004 is a `hidden beast` number, since 40 + 0 + 2 + 220 + 400 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 289400961600 + 110821078404 = 537960^2 + 332898^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 150232167 + ... + 150234830.

It is an arithmetic number, because the mean of its divisors is an integer number (28861524419).

Almost surely, 2^400222040004 is an apocalyptic number.

It is an amenable number.

400222040004 is an abundant number, since it is smaller than the sum of its proper divisors (638792839080).

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

400222040004 is a wasteful number, since it uses less digits than its factorization.

400222040004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300467044 (or 300467039 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 400222040004 its reverse (400040222004), we get a palindrome (800262262008).

The spelling of 400222040004 in words is "four hundred billion, two hundred twenty-two million, forty thousand, four".