3645394 has 8 divisors (see below), whose sum is σ = 5483520. Its totient is φ = 1817556.

The previous prime is 3645391. The next prime is 3645407. The reversal of 3645394 is 4935463.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 3⁵ + 6⁸ + 4⁵ + 5⁹ + 3⁸ + 9³ + 4⁶ .

It is not an unprimeable number, because it can be changed into a prime (3645391) 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, 1614 + ... + 3145.

It is an arithmetic number, because the mean of its divisors is an integer number (685440).

Almost surely, 2^3645394 is an apocalyptic number.

3645394 is a deficient number, since it is larger than the sum of its proper divisors (1838126).

3645394 is a wasteful number, since it uses less digits than its factorization.

3645394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5144.

The product of its digits is 38880, while the sum is 34.

The square root of 3645394 is about 1909.2914916272. The cubic root of 3645394 is about 153.9033801083.

The spelling of 3645394 in words is "three million, six hundred forty-five thousand, three hundred ninety-four".