1423022220 has 144 divisors (see below), whose sum is σ = 4537172640. Its totient is φ = 360557568.

The previous prime is 1423022207. The next prime is 1423022273. The reversal of 1423022220 is 222203241.

1423022220 is a `hidden beast` number, since 1 + 423 + 0 + 22 + 220 = 666.

It is a super-2 number, since 2×1423022220² = 4049984477227456800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1423022193 and 1423022202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283896 + ... + 288864.

Almost surely, 2^1423022220 is an apocalyptic number.

1423022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2268586320).

1423022220 is an abundant number, since it is smaller than the sum of its proper divisors (3114150420).

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

1423022220 is a wasteful number, since it uses less digits than its factorization.

1423022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064 (or 5059 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1423022220 is about 37722.9667444118. The cubic root of 1423022220 is about 1124.7877051263.

Adding to 1423022220 its reverse (222203241), we get a palindrome (1645225461).

The spelling of 1423022220 in words is "one billion, four hundred twenty-three million, twenty-two thousand, two hundred twenty".