13280312 has 8 divisors (see below), whose sum is σ = 24900600. Its totient is φ = 6640152.

The previous prime is 13280303. The next prime is 13280317. The reversal of 13280312 is 21308231.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830012 + ... + 830027.

It is an arithmetic number, because the mean of its divisors is an integer number (3112575).

Almost surely, 2^13280312 is an apocalyptic number.

It is an amenable number.

13280312 is a deficient number, since it is larger than the sum of its proper divisors (11620288).

13280312 is a wasteful number, since it uses less digits than its factorization.

13280312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660045 (or 1660041 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 13280312 is about 3644.2162394677. The cubic root of 13280312 is about 236.8114840273.

Adding to 13280312 its reverse (21308231), we get a palindrome (34588543).

The spelling of 13280312 in words is "thirteen million, two hundred eighty thousand, three hundred twelve".