16860385 has 4 divisors (see below), whose sum is σ = 20232468. Its totient is φ = 13488304.

The previous prime is 16860367. The next prime is 16860409. The reversal of 16860385 is 58306861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7667361 + 9193024 = 2769^2 + 3032^2 .

It is a cyclic number.

It is not a de Polignac number, because 16860385 - 2¹³ = 16852193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686034 + ... + 1686043.

It is an arithmetic number, because the mean of its divisors is an integer number (5058117).

Almost surely, 2^16860385 is an apocalyptic number.

It is an amenable number.

16860385 is a deficient number, since it is larger than the sum of its proper divisors (3372083).

16860385 is an equidigital number, since it uses as much as digits as its factorization.

16860385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372082.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 16860385 is about 4106.1399148105. The cubic root of 16860385 is about 256.4223223224.

The spelling of 16860385 in words is "sixteen million, eight hundred sixty thousand, three hundred eighty-five".