400222442020 has 48 divisors (see below), whose sum is σ = 877907818368. Its totient is φ = 152971681280.

The previous prime is 400222442017. The next prime is 400222442093. The reversal of 400222442020 is 20244222004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400222441982 and 400222442000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4155 + ... + 894685.

It is an arithmetic number, because the mean of its divisors is an integer number (18289746216).

Almost surely, 2^400222442020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400222442020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438953909184).

400222442020 is an abundant number, since it is smaller than the sum of its proper divisors (477685376348).

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

400222442020 is a wasteful number, since it uses less digits than its factorization.

400222442020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891540 (or 891538 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 400222442020 its reverse (20244222004), we get a palindrome (420466664024).

The spelling of 400222442020 in words is "four hundred billion, two hundred twenty-two million, four hundred forty-two thousand, twenty".