4009365 has 32 divisors (see below), whose sum is σ = 7551360. Its totient is φ = 2011392.

The previous prime is 4009339. The next prime is 4009373. The reversal of 4009365 is 5639004.

It is a happy number.

It is not a de Polignac number, because 4009365 - 2⁵ = 4009333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

4009365 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1422 + ... + 3168.

It is an arithmetic number, because the mean of its divisors is an integer number (235980).

Almost surely, 2^4009365 is an apocalyptic number.

4009365 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4009365 is a deficient number, since it is larger than the sum of its proper divisors (3541995).

4009365 is a wasteful number, since it uses less digits than its factorization.

4009365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 4009365 is about 2002.3398812389. The cubic root of 4009365 is about 158.8638920655.

The spelling of 4009365 in words is "four million, nine thousand, three hundred sixty-five".