13780726 has 16 divisors (see below), whose sum is σ = 22074624. Its totient is φ = 6436584.

The previous prime is 13780651. The next prime is 13780733. The reversal of 13780726 is 62708731.

It is a junction number, because it is equal to n+sod(n) for n = 13780691 and 13780700.

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 7 ways as a sum of consecutive naturals, for example, 1506 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (1379664).

Almost surely, 2^13780726 is an apocalyptic number.

13780726 is a deficient number, since it is larger than the sum of its proper divisors (8293898).

13780726 is a wasteful number, since it uses less digits than its factorization.

13780726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7035.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 13780726 is about 3712.2400245674. The cubic root of 13780726 is about 239.7493099943.

The spelling of 13780726 in words is "thirteen million, seven hundred eighty thousand, seven hundred twenty-six".