13782818 has 24 divisors (see below), whose sum is σ = 25467372. Its totient is φ = 5558784.

The previous prime is 13782793. The next prime is 13782829. The reversal of 13782818 is 81828731.

It can be written as a sum of positive squares in 2 ways, for example, as 12694969 + 1087849 = 3563^2 + 1043^2 .

It is a super-2 number, since 2×13782818² = 379932144042248, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2471 + ... + 5802.

Almost surely, 2^13782818 is an apocalyptic number.

13782818 is a deficient number, since it is larger than the sum of its proper divisors (11684554).

13782818 is a wasteful number, since it uses less digits than its factorization.

13782818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8306 (or 8299 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 13782818 is about 3712.5217844479. The cubic root of 13782818 is about 239.7614411930.

The spelling of 13782818 in words is "thirteen million, seven hundred eighty-two thousand, eight hundred eighteen".