3640259 has 8 divisors (see below), whose sum is σ = 4245600. Its totient is φ = 3119928.

The previous prime is 3640249. The next prime is 3640289. The reversal of 3640259 is 9520463.

It is not a de Polignac number, because 3640259 - 2⁴ = 3640243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640249) 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 7 ways as a sum of consecutive naturals, for example, 4964 + ... + 5649.

It is an arithmetic number, because the mean of its divisors is an integer number (530700).

Almost surely, 2^3640259 is an apocalyptic number.

3640259 is a deficient number, since it is larger than the sum of its proper divisors (605341).

3640259 is an equidigital number, since it uses as much as digits as its factorization.

3640259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10634 (or 10620 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 3640259 is about 1907.9462780697. The cubic root of 3640259 is about 153.8310820043.

The spelling of 3640259 in words is "three million, six hundred forty thousand, two hundred fifty-nine".