1322321240 has 16 divisors (see below), whose sum is σ = 2975222880. Its totient is φ = 528928480.

The previous prime is 1322321219. The next prime is 1322321243. The reversal of 1322321240 is 421232231.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322321243) 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 3 ways as a sum of consecutive naturals, for example, 16528976 + ... + 16529055.

It is an arithmetic number, because the mean of its divisors is an integer number (185951430).

Almost surely, 2^1322321240 is an apocalyptic number.

1322321240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322321240 is an abundant number, since it is smaller than the sum of its proper divisors (1652901640).

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

1322321240 is a wasteful number, since it uses less digits than its factorization.

1322321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33058042 (or 33058038 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1322321240 is about 36363.7352316838. The cubic root of 1322321240 is about 1097.6039416364.

Adding to 1322321240 its reverse (421232231), we get a palindrome (1743553471).

The spelling of 1322321240 in words is "one billion, three hundred twenty-two million, three hundred twenty-one thousand, two hundred forty".