3645389 has 4 divisors (see below), whose sum is σ = 3976800. Its totient is φ = 3313980.

The previous prime is 3645377. The next prime is 3645391. The reversal of 3645389 is 9835463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3645389 - 2⁴ = 3645373 is a prime.

It is a super-2 number, since 2×3645389² = 26577721922642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165689 + ... + 165710.

It is an arithmetic number, because the mean of its divisors is an integer number (994200).

Almost surely, 2^3645389 is an apocalyptic number.

It is an amenable number.

3645389 is a deficient number, since it is larger than the sum of its proper divisors (331411).

3645389 is a wasteful number, since it uses less digits than its factorization.

3645389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331410.

The product of its digits is 77760, while the sum is 38.

The square root of 3645389 is about 1909.2901822405. The cubic root of 3645389 is about 153.9033097440.

The spelling of 3645389 in words is "three million, six hundred forty-five thousand, three hundred eighty-nine".