400222240220 has 36 divisors (see below), whose sum is σ = 923818779912. Its totient is φ = 145535359200.

The previous prime is 400222240213. The next prime is 400222240267. The reversal of 400222240220 is 22042222004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 400222240192 and 400222240201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82688126 + ... + 82692965.

Almost surely, 2^400222240220 is an apocalyptic number.

It is an amenable number.

400222240220 is an abundant number, since it is smaller than the sum of its proper divisors (523596539692).

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

400222240220 is a wasteful number, since it uses less digits than its factorization.

400222240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165381122 (or 165381109 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 400222240220 its reverse (22042222004), we get a palindrome (422264462224).

It can be divided in two parts, 4002 and 22240220, that added together give a palindrome (22244222).

The spelling of 400222240220 in words is "four hundred billion, two hundred twenty-two million, two hundred forty thousand, two hundred twenty".