13909636 has 12 divisors (see below), whose sum is σ = 26214412. Its totient is φ = 6419808.

The previous prime is 13909633. The next prime is 13909657. The reversal of 13909636 is 63690931.

It can be written as a sum of positive squares in 2 ways, for example, as 732736 + 13176900 = 856^2 + 3630^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13909595 and 13909604.

It is not an unprimeable number, because it can be changed into a prime (13909631) 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 3 ways as a sum of consecutive naturals, for example, 133695 + ... + 133798.

Almost surely, 2^13909636 is an apocalyptic number.

It is an amenable number.

13909636 is a deficient number, since it is larger than the sum of its proper divisors (12304776).

13909636 is a wasteful number, since it uses less digits than its factorization.

13909636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267510 (or 267508 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 13909636 is about 3729.5624408233. The cubic root of 13909636 is about 240.4945588850.

It can be divided in two parts, 1390 and 9636, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 13909636 in words is "thirteen million, nine hundred nine thousand, six hundred thirty-six".