400224361842 has 18 divisors (see below), whose sum is σ = 867158599437. Its totient is φ = 133407225936.

The previous prime is 400224361819. The next prime is 400224361847. The reversal of 400224361842 is 248163422004.

400224361842 is a `hidden beast` number, since 40 + 0 + 2 + 2 + 436 + 184 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 388803378681 + 11420983161 = 623541^2 + 106869^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=447339.

It is a super-2 number, since 2×400224361842² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400224361797 and 400224361806.

It is not an unprimeable number, because it can be changed into a prime (400224361847) 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 8 ways as a sum of consecutive naturals, for example, 2609478 + ... + 2758590.

Almost surely, 2^400224361842 is an apocalyptic number.

400224361842 is an abundant number, since it is smaller than the sum of its proper divisors (466934237595).

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

400224361842 is an frugal number, since it uses more digits than its factorization.

400224361842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298234 (or 149118 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

Adding to 400224361842 its reverse (248163422004), we get a palindrome (648387783846).

The spelling of 400224361842 in words is "four hundred billion, two hundred twenty-four million, three hundred sixty-one thousand, eight hundred forty-two".