13011640 has 32 divisors (see below), whose sum is σ = 29425680. Its totient is φ = 5178112.

The previous prime is 13011631. The next prime is 13011641. The reversal of 13011640 is 4611031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8364 + ... + 9796.

Almost surely, 2^13011640 is an apocalyptic number.

13011640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13011640 is an abundant number, since it is smaller than the sum of its proper divisors (16414040).

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

13011640 is a wasteful number, since it uses less digits than its factorization.

13011640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13011640 is about 3607.1650918692. The cubic root of 13011640 is about 235.2036261338.

Adding to 13011640 its reverse (4611031), we get a palindrome (17622671).

The spelling of 13011640 in words is "thirteen million, eleven thousand, six hundred forty".