3640087 has 4 divisors (see below), whose sum is σ = 3971016. Its totient is φ = 3309160.

The previous prime is 3640081. The next prime is 3640121. The reversal of 3640087 is 7800463.

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

It is a cyclic number.

It is not a de Polignac number, because 3640087 - 2⁷ = 3639959 is a prime.

It is a Duffinian number.

3640087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640081) 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, 165448 + ... + 165469.

It is an arithmetic number, because the mean of its divisors is an integer number (992754).

Almost surely, 2^3640087 is an apocalyptic number.

3640087 is a deficient number, since it is larger than the sum of its proper divisors (330929).

3640087 is a wasteful number, since it uses less digits than its factorization.

3640087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330928.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 3640087 is about 1907.9012028929. The cubic root of 3640087 is about 153.8286591581.

The spelling of 3640087 in words is "three million, six hundred forty thousand, eighty-seven".