12320001440 has 48 divisors (see below), whose sum is σ = 29815921800. Its totient is φ = 4807802880.

The previous prime is 12320001433. The next prime is 12320001511. The reversal of 12320001440 is 4410002321.

It can be written as a sum of positive squares in 4 ways, for example, as 4193339536 + 8126661904 = 64756^2 + 90148^2 .

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, 932465 + ... + 945584.

Almost surely, 2^12320001440 is an apocalyptic number.

12320001440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12320001440 is an abundant number, since it is smaller than the sum of its proper divisors (17495920360).

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

12320001440 is a wasteful number, since it uses less digits than its factorization.

12320001440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878105 (or 1878097 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 12320001440 its reverse (4410002321), we get a palindrome (16730003761).

The spelling of 12320001440 in words is "twelve billion, three hundred twenty million, one thousand, four hundred forty".