1322412440 has 48 divisors (see below), whose sum is σ = 3012336000. Its totient is φ = 522483008.

The previous prime is 1322412397. The next prime is 1322412451. The reversal of 1322412440 is 442142231.

It is a super-2 number, since 2×1322412440² = 3497549322933507200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273161 + ... + 277959.

It is an arithmetic number, because the mean of its divisors is an integer number (62757000).

Almost surely, 2^1322412440 is an apocalyptic number.

1322412440 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 1322412440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506168000).

1322412440 is an abundant number, since it is smaller than the sum of its proper divisors (1689923560).

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

1322412440 is an equidigital number, since it uses as much as digits as its factorization.

1322412440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976 (or 4889 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1322412440 is about 36364.9892066531. The cubic root of 1322412440 is about 1097.6291748337.

Adding to 1322412440 its reverse (442142231), we get a palindrome (1764554671).

The spelling of 1322412440 in words is "one billion, three hundred twenty-two million, four hundred twelve thousand, four hundred forty".