1423012220 has 96 divisors (see below), whose sum is σ = 3711160320. Its totient is φ = 447275520.

The previous prime is 1423012187. The next prime is 1423012243. The reversal of 1423012220 is 222103241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73832 + ... + 91088.

It is an arithmetic number, because the mean of its divisors is an integer number (38657920).

Almost surely, 2^1423012220 is an apocalyptic number.

1423012220 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 1423012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1855580160).

1423012220 is an abundant number, since it is smaller than the sum of its proper divisors (2288148100).

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

1423012220 is a wasteful number, since it uses less digits than its factorization.

1423012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17323 (or 17321 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1423012220 is about 37722.8341989305. The cubic root of 1423012220 is about 1124.7850703810.

Adding to 1423012220 its reverse (222103241), we get a palindrome (1645115461).

The spelling of 1423012220 in words is "one billion, four hundred twenty-three million, twelve thousand, two hundred twenty".