1423452220 has 24 divisors (see below), whose sum is σ = 3058768944. Its totient is φ = 556139136.

The previous prime is 1423452179. The next prime is 1423452229. The reversal of 1423452220 is 222543241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423452229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 826729 + ... + 828448.

It is an arithmetic number, because the mean of its divisors is an integer number (127448706).

Almost surely, 2^1423452220 is an apocalyptic number.

1423452220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423452220 is an abundant number, since it is smaller than the sum of its proper divisors (1635316724).

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

1423452220 is a wasteful number, since it uses less digits than its factorization.

1423452220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655229 (or 1655227 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1423452220 is about 37728.6657596051. The cubic root of 1423452220 is about 1124.9009875000.

Adding to 1423452220 its reverse (222543241), we get a palindrome (1645995461).

The spelling of 1423452220 in words is "one billion, four hundred twenty-three million, four hundred fifty-two thousand, two hundred twenty".