400020220220 has 48 divisors (see below), whose sum is σ = 847827509760. Its totient is φ = 158531471424.

The previous prime is 400020220207. The next prime is 400020220231. The reversal of 400020220220 is 22022020004.

It is a junction number, because it is equal to n+sod(n) for n = 400020220195 and 400020220204.

It is a congruent number.

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, 830321 + ... + 1220439.

It is an arithmetic number, because the mean of its divisors is an integer number (17663073120).

Almost surely, 2^400020220220 is an apocalyptic number.

It is an amenable number.

400020220220 is an abundant number, since it is smaller than the sum of its proper divisors (447807289540).

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

400020220220 is a wasteful number, since it uses less digits than its factorization.

400020220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390602 (or 390600 counting only the distinct ones).

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

Adding to 400020220220 its reverse (22022020004), we get a palindrome (422042240224).

The spelling of 400020220220 in words is "four hundred billion, twenty million, two hundred twenty thousand, two hundred twenty".