13230640 has 20 divisors (see below), whose sum is σ = 30761424. Its totient is φ = 5292224.

The previous prime is 13230619. The next prime is 13230643. The reversal of 13230640 is 4603231.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (13230643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82612 + ... + 82771.

Almost surely, 2^13230640 is an apocalyptic number.

13230640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13230640 is an abundant number, since it is smaller than the sum of its proper divisors (17530784).

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

13230640 is a wasteful number, since it uses less digits than its factorization.

13230640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165396 (or 165390 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 13230640 is about 3637.3946720146. The cubic root of 13230640 is about 236.5158685811.

Adding to 13230640 its reverse (4603231), we get a palindrome (17833871).

The spelling of 13230640 in words is "thirteen million, two hundred thirty thousand, six hundred forty".