8398665 has 72 divisors (see below), whose sum is σ = 17117568. Its totient is φ = 3775680.

The previous prime is 8398633. The next prime is 8398673. The reversal of 8398665 is 5668938.

It is not a de Polignac number, because 8398665 - 2⁵ = 8398633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8398665.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 178672 + ... + 178718.

It is an arithmetic number, because the mean of its divisors is an integer number (237744).

Almost surely, 2^8398665 is an apocalyptic number.

It is an amenable number.

8398665 is an abundant number, since it is smaller than the sum of its proper divisors (8718903).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8398665 is a wasteful number, since it uses less digits than its factorization.

8398665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 85 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 8398665 is about 2898.0450307060. The cubic root of 8398665 is about 203.2685018310.

The spelling of 8398665 in words is "eight million, three hundred ninety-eight thousand, six hundred sixty-five".