13920586 has 8 divisors (see below), whose sum is σ = 22109220. Its totient is φ = 6550848.

The previous prime is 13920541. The next prime is 13920587. The reversal of 13920586 is 68502931.

13920586 = 153² + 154² + ... + 356².

It can be written as a sum of positive squares in 2 ways, for example, as 13920361 + 225 = 3731^2 + 15^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 409429 = 13920586 / (1 + 3 + 9 + 2 + 0 + 5 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (13920587) 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, 204681 + ... + 204748.

Almost surely, 2^13920586 is an apocalyptic number.

13920586 is a deficient number, since it is larger than the sum of its proper divisors (8188634).

13920586 is a wasteful number, since it uses less digits than its factorization.

13920586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409448.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 13920586 is about 3731.0301526522. The cubic root of 13920586 is about 240.5576500325.

The spelling of 13920586 in words is "thirteen million, nine hundred twenty thousand, five hundred eighty-six".