13782649 has 8 divisors (see below), whose sum is σ = 13969800. Its totient is φ = 13597056.

The previous prime is 13782647. The next prime is 13782667. The reversal of 13782649 is 94628731.

It can be written as a sum of positive squares in 4 ways, for example, as 144400 + 13638249 = 380^2 + 3693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13782649 - 2¹ = 13782647 is a prime.

It is a super-2 number, since 2×13782649² = 379922826914402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13782647) by changing a digit.

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, 34519 + ... + 34915.

It is an arithmetic number, because the mean of its divisors is an integer number (1746225).

Almost surely, 2^13782649 is an apocalyptic number.

It is an amenable number.

13782649 is a deficient number, since it is larger than the sum of its proper divisors (187151).

13782649 is a wasteful number, since it uses less digits than its factorization.

13782649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its digits is 72576, while the sum is 40.

The square root of 13782649 is about 3712.4990235689. The cubic root of 13782649 is about 239.7604612326.

The spelling of 13782649 in words is "thirteen million, seven hundred eighty-two thousand, six hundred forty-nine".