16580389 has 16 divisors (see below), whose sum is σ = 20176128. Its totient is φ = 13300992.

The previous prime is 16580387. The next prime is 16580411. The reversal of 16580389 is 98308561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16580389 - 2¹ = 16580387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16580383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32712 + ... + 33214.

It is an arithmetic number, because the mean of its divisors is an integer number (1261008).

Almost surely, 2^16580389 is an apocalyptic number.

It is an amenable number.

16580389 is a deficient number, since it is larger than the sum of its proper divisors (3595739).

16580389 is a wasteful number, since it uses less digits than its factorization.

16580389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 16580389 is about 4071.9023809517. The cubic root of 16580389 is about 254.9949454336.

The spelling of 16580389 in words is "sixteen million, five hundred eighty thousand, three hundred eighty-nine".