1323210420 has 72 divisors (see below), whose sum is σ = 4587133824. Its totient is φ = 302447808.

The previous prime is 1323210389. The next prime is 1323210439. The reversal of 1323210420 is 240123231.

1323210420 is a `hidden beast` number, since 1 + 3 + 232 + 10 + 420 = 666.

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 = 1323210393 and 1323210402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 523824 + ... + 526343.

It is an arithmetic number, because the mean of its divisors is an integer number (63710192).

Almost surely, 2^1323210420 is an apocalyptic number.

1323210420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323210420 is an abundant number, since it is smaller than the sum of its proper divisors (3263923404).

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

1323210420 is a wasteful number, since it uses less digits than its factorization.

1323210420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050189 (or 1050184 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1323210420 is about 36375.9593687919. The cubic root of 1323210420 is about 1097.8499103077.

Adding to 1323210420 its reverse (240123231), we get a palindrome (1563333651).

The spelling of 1323210420 in words is "one billion, three hundred twenty-three million, two hundred ten thousand, four hundred twenty".