8408389 has 4 divisors (see below), whose sum is σ = 9172800. Its totient is φ = 7643980.

The previous prime is 8408377. The next prime is 8408399. The reversal of 8408389 is 9838048.

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 8408389 - 2⁵ = 8408357 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8408329) 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, 382189 + ... + 382210.

It is an arithmetic number, because the mean of its divisors is an integer number (2293200).

Almost surely, 2^8408389 is an apocalyptic number.

It is an amenable number.

8408389 is a deficient number, since it is larger than the sum of its proper divisors (764411).

8408389 is a wasteful number, since it uses less digits than its factorization.

8408389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764410.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 8408389 is about 2899.7222280763. The cubic root of 8408389 is about 203.3469198721.

It can be divided in two parts, 840 and 8389, that added together give a palindrome (9229).

The spelling of 8408389 in words is "eight million, four hundred eight thousand, three hundred eighty-nine".