1423201220 has 48 divisors (see below), whose sum is σ = 3420361728. Its totient is φ = 487286400.

The previous prime is 1423201183. The next prime is 1423201231. The reversal of 1423201220 is 221023241.

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, 101645 + ... + 114795.

It is an arithmetic number, because the mean of its divisors is an integer number (71257536).

Almost surely, 2^1423201220 is an apocalyptic number.

1423201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423201220 is an abundant number, since it is smaller than the sum of its proper divisors (1997160508).

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

1423201220 is a wasteful number, since it uses less digits than its factorization.

1423201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13940 (or 13938 counting only the distinct ones).

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

The square root of 1423201220 is about 37725.3392297538. The cubic root of 1423201220 is about 1124.8348649797.

Adding to 1423201220 its reverse (221023241), we get a palindrome (1644224461).

The spelling of 1423201220 in words is "one billion, four hundred twenty-three million, two hundred one thousand, two hundred twenty".