400220424220 has 24 divisors (see below), whose sum is σ = 840629235600. Its totient is φ = 160056484992.

The previous prime is 400220424217. The next prime is 400220424229. The reversal of 400220424220 is 22424022004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400220424191 and 400220424200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400220424229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876585 + ... + 2078944.

It is an arithmetic number, because the mean of its divisors is an integer number (35026218150).

Almost surely, 2^400220424220 is an apocalyptic number.

It is an amenable number.

400220424220 is an abundant number, since it is smaller than the sum of its proper divisors (440408811380).

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

400220424220 is a wasteful number, since it uses less digits than its factorization.

400220424220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960597 (or 3960595 counting only the distinct ones).

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

Adding to 400220424220 its reverse (22424022004), we get a palindrome (422644446224).

The spelling of 400220424220 in words is "four hundred billion, two hundred twenty million, four hundred twenty-four thousand, two hundred twenty".