1323301440 has 56 divisors (see below), whose sum is σ = 4201485120. Its totient is φ = 352880128.

The previous prime is 1323301439. The next prime is 1323301489. The reversal of 1323301440 is 441033231.

It is a super-2 number, since 2×1323301440² = 3502253402212147200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688260 + ... + 690179.

It is an arithmetic number, because the mean of its divisors is an integer number (75026520).

Almost surely, 2^1323301440 is an apocalyptic number.

1323301440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323301440 is an abundant number, since it is smaller than the sum of its proper divisors (2878183680).

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

1323301440 is a wasteful number, since it uses less digits than its factorization.

1323301440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378459 (or 1378449 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1323301440 is about 36377.2104483013. The cubic root of 1323301440 is about 1097.8750824209.

Adding to 1323301440 its reverse (441033231), we get a palindrome (1764334671).

Subtracting from 1323301440 its reverse (441033231), we obtain a square (882268209 = 29703²).

The spelling of 1323301440 in words is "one billion, three hundred twenty-three million, three hundred one thousand, four hundred forty".