400402000220 has 24 divisors (see below), whose sum is σ = 855095799600. Its totient is φ = 157446209792.

The previous prime is 400402000183. The next prime is 400402000261. The reversal of 400402000220 is 22000204004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400402000195 and 400402000204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169660685 + ... + 169663044.

It is an arithmetic number, because the mean of its divisors is an integer number (35628991650).

Almost surely, 2^400402000220 is an apocalyptic number.

It is an amenable number.

400402000220 is an abundant number, since it is smaller than the sum of its proper divisors (454693799380).

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

400402000220 is a wasteful number, since it uses less digits than its factorization.

400402000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339323797 (or 339323795 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 400402000220 its reverse (22000204004), we get a palindrome (422402204224).

The spelling of 400402000220 in words is "four hundred billion, four hundred two million, two hundred twenty", and thus it is an aban number.