7894385 has 4 divisors (see below), whose sum is σ = 9473268. Its totient is φ = 6315504.

The previous prime is 7894363. The next prime is 7894387. The reversal of 7894385 is 5834987.

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 802816 + 7091569 = 896^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 7894385 - 2⁶ = 7894321 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7894387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789434 + ... + 789443.

It is an arithmetic number, because the mean of its divisors is an integer number (2368317).

Almost surely, 2^7894385 is an apocalyptic number.

It is an amenable number.

7894385 is a deficient number, since it is larger than the sum of its proper divisors (1578883).

7894385 is a wasteful number, since it uses less digits than its factorization.

7894385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578882.

The product of its digits is 241920, while the sum is 44.

The square root of 7894385 is about 2809.6948232860. The cubic root of 7894385 is about 199.1159732407.

It can be divided in two parts, 789 and 4385, that multiplied together give a triangular number (3459765 = T₂₆₃₀).

The spelling of 7894385 in words is "seven million, eight hundred ninety-four thousand, three hundred eighty-five".