8540385 has 32 divisors (see below), whose sum is σ = 15744000. Its totient is φ = 3872448.

The previous prime is 8540381. The next prime is 8540387. The reversal of 8540385 is 5830458.

It is a happy number.

8540385 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8540385 - 2² = 8540381 is a prime.

It is a Curzon number.

8540385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8540381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16866 + ... + 17364.

It is an arithmetic number, because the mean of its divisors is an integer number (492000).

Almost surely, 2^8540385 is an apocalyptic number.

It is an amenable number.

8540385 is a deficient number, since it is larger than the sum of its proper divisors (7203615).

8540385 is a wasteful number, since it uses less digits than its factorization.

8540385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 8540385 is about 2922.3937106420. The cubic root of 8540385 is about 204.4054556265.

It can be divided in two parts, 85 and 40385, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 8540385 in words is "eight million, five hundred forty thousand, three hundred eighty-five".