3640235 has 4 divisors (see below), whose sum is σ = 4368288. Its totient is φ = 2912184.

The previous prime is 3640223. The next prime is 3640243. The reversal of 3640235 is 5320463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5320463 = 1583 ⋅3361.

It is a cyclic number.

It is not a de Polignac number, because 3640235 - 2¹⁰ = 3639211 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3640235.

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, 364019 + ... + 364028.

It is an arithmetic number, because the mean of its divisors is an integer number (1092072).

Almost surely, 2^3640235 is an apocalyptic number.

3640235 is a deficient number, since it is larger than the sum of its proper divisors (728053).

3640235 is an equidigital number, since it uses as much as digits as its factorization.

3640235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728052.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 3640235 is about 1907.9399885741. The cubic root of 3640235 is about 153.8307439373.

Adding to 3640235 its reverse (5320463), we get a palindrome (8960698).

The spelling of 3640235 in words is "three million, six hundred forty thousand, two hundred thirty-five".