13313640 has 32 divisors (see below), whose sum is σ = 39941280. Its totient is φ = 3550272.

The previous prime is 13313611. The next prime is 13313647. The reversal of 13313640 is 4631331.

13313640 = T₃₅₆ + T₃₅₇ + ... + T₄₉₉.

It is not an unprimeable number, because it can be changed into a prime (13313647) 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, 55354 + ... + 55593.

It is an arithmetic number, because the mean of its divisors is an integer number (1248165).

Almost surely, 2^13313640 is an apocalyptic number.

13313640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13313640 is an abundant number, since it is smaller than the sum of its proper divisors (26627640).

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

13313640 is a wasteful number, since it uses less digits than its factorization.

13313640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110961 (or 110957 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 13313640 is about 3648.7860995131. The cubic root of 13313640 is about 237.0094176321.

Adding to 13313640 its reverse (4631331), we get a palindrome (17944971).

The spelling of 13313640 in words is "thirteen million, three hundred thirteen thousand, six hundred forty".