8406889 has 4 divisors (see below), whose sum is σ = 8417860. Its totient is φ = 8395920.

The previous prime is 8406847. The next prime is 8406901. The reversal of 8406889 is 9886048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3080025 + 5326864 = 1755^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 8406889 - 2¹⁹ = 7882601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8406809) 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, 4242 + ... + 5899.

It is an arithmetic number, because the mean of its divisors is an integer number (2104465).

Almost surely, 2^8406889 is an apocalyptic number.

It is an amenable number.

8406889 is a deficient number, since it is larger than the sum of its proper divisors (10971).

8406889 is a wasteful number, since it uses less digits than its factorization.

8406889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10970.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 8406889 is about 2899.4635710766. The cubic root of 8406889 is about 203.3348272457.

The spelling of 8406889 in words is "eight million, four hundred six thousand, eight hundred eighty-nine".