1322543040 has 224 divisors, whose sum is σ = 5168432640. Its totient is φ = 279023616.

The previous prime is 1322543039. The next prime is 1322543041. The reversal of 1322543040 is 403452231.

It is an interprime number because it is at equal distance from previous prime (1322543039) and next prime (1322543041).

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1322543040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322543041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79791 + ... + 94929.

It is an arithmetic number, because the mean of its divisors is an integer number (23073360).

Almost surely, 2^1322543040 is an apocalyptic number.

1322543040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1322543040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2584216320).

1322543040 is an abundant number, since it is smaller than the sum of its proper divisors (3845889600).

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

1322543040 is a wasteful number, since it uses less digits than its factorization.

1322543040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15179 (or 15169 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1322543040 is about 36366.7848455153. The cubic root of 1322543040 is about 1097.6653071948.

Adding to 1322543040 its reverse (403452231), we get a palindrome (1725995271).

It can be divided in two parts, 13225 and 43040, that added together give a palindrome (56265).

The spelling of 1322543040 in words is "one billion, three hundred twenty-two million, five hundred forty-three thousand, forty".