13065640 has 32 divisors (see below), whose sum is σ = 33598080. Its totient is φ = 4479552.

The previous prime is 13065629. The next prime is 13065643. The reversal of 13065640 is 4656031.

It is not an unprimeable number, because it can be changed into a prime (13065643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23052 + ... + 23611.

It is an arithmetic number, because the mean of its divisors is an integer number (1049940).

Almost surely, 2^13065640 is an apocalyptic number.

13065640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13065640 is an abundant number, since it is smaller than the sum of its proper divisors (20532440).

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

13065640 is a wasteful number, since it uses less digits than its factorization.

13065640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46681 (or 46677 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 13065640 is about 3614.6424442813. The cubic root of 13065640 is about 235.5285522755.

The spelling of 13065640 in words is "thirteen million, sixty-five thousand, six hundred forty".