16290385 has 4 divisors (see below), whose sum is σ = 19548468. Its totient is φ = 13032304.

The previous prime is 16290367. The next prime is 16290389. The reversal of 16290385 is 58309261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58309261 = 73 ⋅798757.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 10297681 = 2448^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 16290385 - 2⁹ = 16289873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16290385.

It is not an unprimeable number, because it can be changed into a prime (16290389) 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, 1629034 + ... + 1629043.

It is an arithmetic number, because the mean of its divisors is an integer number (4887117).

Almost surely, 2^16290385 is an apocalyptic number.

It is an amenable number.

16290385 is a deficient number, since it is larger than the sum of its proper divisors (3258083).

16290385 is an equidigital number, since it uses as much as digits as its factorization.

16290385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258082.

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

The square root of 16290385 is about 4036.1349085480. The cubic root of 16290385 is about 253.4995052814.

The spelling of 16290385 in words is "sixteen million, two hundred ninety thousand, three hundred eighty-five".