13317940 has 12 divisors (see below), whose sum is σ = 27967716. Its totient is φ = 5327168.

The previous prime is 13317937. The next prime is 13317959. The reversal of 13317940 is 4971331.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 9205156 = 2028^2 + 3034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13317899 and 13317908.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 332929 + ... + 332968.

It is an arithmetic number, because the mean of its divisors is an integer number (2330643).

Almost surely, 2^13317940 is an apocalyptic number.

13317940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13317940 is an abundant number, since it is smaller than the sum of its proper divisors (14649776).

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

13317940 is a wasteful number, since it uses less digits than its factorization.

13317940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665906 (or 665904 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 13317940 is about 3649.3752890050. The cubic root of 13317940 is about 237.0349310854.

It can be divided in two parts, 133 and 17940, that multiplied together give a triangular number (2386020 = T₂₁₈₄).

The spelling of 13317940 in words is "thirteen million, three hundred seventeen thousand, nine hundred forty".