1423112220 has 192 divisors, whose sum is σ = 4534185600. Its totient is φ = 370483200.

The previous prime is 1423112191. The next prime is 1423112231. The reversal of 1423112220 is 222113241.

It is a happy number.

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 = 1423112193 and 1423112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5290246 + ... + 5290514.

It is an arithmetic number, because the mean of its divisors is an integer number (23615550).

Almost surely, 2^1423112220 is an apocalyptic number.

1423112220 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 1423112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267092800).

1423112220 is an abundant number, since it is smaller than the sum of its proper divisors (3111073380).

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

1423112220 is a wasteful number, since it uses less digits than its factorization.

1423112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1423112220 is about 37724.1596327871. The cubic root of 1423112220 is about 1124.8114172787.

Adding to 1423112220 its reverse (222113241), we get a palindrome (1645225461).

The spelling of 1423112220 in words is "one billion, four hundred twenty-three million, one hundred twelve thousand, two hundred twenty".