8440369 has 4 divisors (see below), whose sum is σ = 9646144. Its totient is φ = 7234596.

The previous prime is 8440361. The next prime is 8440373. The reversal of 8440369 is 9630448.

8440369 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8440369 - 2³ = 8440361 is a prime.

It is a super-2 number, since 2×8440369² = 142479657712322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

8440369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8440361) 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, 602877 + ... + 602890.

It is an arithmetic number, because the mean of its divisors is an integer number (2411536).

Almost surely, 2^8440369 is an apocalyptic number.

It is an amenable number.

8440369 is a deficient number, since it is larger than the sum of its proper divisors (1205775).

8440369 is a wasteful number, since it uses less digits than its factorization.

8440369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205774.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 8440369 is about 2905.2313160917. The cubic root of 8440369 is about 203.6043931902.

The spelling of 8440369 in words is "eight million, four hundred forty thousand, three hundred sixty-nine".