8426389 has 8 divisors (see below), whose sum is σ = 8830208. Its totient is φ = 8030880.

The previous prime is 8426381. The next prime is 8426393. The reversal of 8426389 is 9836248.

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

It is a cyclic number.

It is not a de Polignac number, because 8426389 - 2³ = 8426381 is a prime.

It is a Duffinian number.

8426389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8426381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49 + ... + 4105.

It is an arithmetic number, because the mean of its divisors is an integer number (1103776).

Almost surely, 2^8426389 is an apocalyptic number.

It is an amenable number.

8426389 is a deficient number, since it is larger than the sum of its proper divisors (403819).

8426389 is a wasteful number, since it uses less digits than its factorization.

8426389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155.

The product of its digits is 82944, while the sum is 40.

The square root of 8426389 is about 2902.8243143532. The cubic root of 8426389 is about 203.4919193406.

The spelling of 8426389 in words is "eight million, four hundred twenty-six thousand, three hundred eighty-nine".