7288189 has 8 divisors (see below), whose sum is σ = 7863480. Its totient is φ = 6729216.

The previous prime is 7288181. The next prime is 7288213. The reversal of 7288189 is 9818827.

It can be written as a sum of positive squares in 4 ways, for example, as 708964 + 6579225 = 842^2 + 2565^2 .

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 7288189 - 2³ = 7288181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7288181) 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, 3144 + ... + 4945.

It is an arithmetic number, because the mean of its divisors is an integer number (982935).

Almost surely, 2^7288189 is an apocalyptic number.

It is an amenable number.

7288189 is a deficient number, since it is larger than the sum of its proper divisors (575291).

7288189 is a wasteful number, since it uses less digits than its factorization.

7288189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8159.

The product of its digits is 64512, while the sum is 43.

The square root of 7288189 is about 2699.6646087987. The cubic root of 7288189 is about 193.8830644718.

It can be divided in two parts, 728818 and 9, that added together give a palindrome (728827).

The spelling of 7288189 in words is "seven million, two hundred eighty-eight thousand, one hundred eighty-nine".