420400222 has 48 divisors (see below), whose sum is σ = 711018000. Its totient is φ = 186243200.

The previous prime is 420400199. The next prime is 420400223. The reversal of 420400222 is 222004024.

It is a junction number, because it is equal to n+sod(n) for n = 420400196 and 420400205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420400223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2821404 + ... + 2821552.

It is an arithmetic number, because the mean of its divisors is an integer number (14812875).

Almost surely, 2^420400222 is an apocalyptic number.

420400222 is a deficient number, since it is larger than the sum of its proper divisors (290617778).

420400222 is a wasteful number, since it uses less digits than its factorization.

420400222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 420400222 is about 20503.6636238503. The cubic root of 420400222 is about 749.1250371317.

Adding to 420400222 its reverse (222004024), we get a palindrome (642404246).

It can be divided in two parts, 4204002 and 22, that added together give a palindrome (4204024).

The spelling of 420400222 in words is "four hundred twenty million, four hundred thousand, two hundred twenty-two".