1423204220 has 48 divisors (see below), whose sum is σ = 3015230400. Its totient is φ = 564258816.

The previous prime is 1423204219. The next prime is 1423204241. The reversal of 1423204220 is 224023241.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1423204192 and 1423204201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404434 + ... + 1405446.

It is an arithmetic number, because the mean of its divisors is an integer number (62817300).

Almost surely, 2^1423204220 is an apocalyptic number.

1423204220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423204220 is an abundant number, since it is smaller than the sum of its proper divisors (1592026180).

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

1423204220 is a wasteful number, since it uses less digits than its factorization.

1423204220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1423204220 is about 37725.3789908067. The cubic root of 1423204220 is about 1124.8356553346.

Adding to 1423204220 its reverse (224023241), we get a palindrome (1647227461).

The spelling of 1423204220 in words is "one billion, four hundred twenty-three million, two hundred four thousand, two hundred twenty".