7639389 has 12 divisors (see below), whose sum is σ = 11076156. Its totient is φ = 5073792.

The previous prime is 7639369. The next prime is 7639397. The reversal of 7639389 is 9839367.

It is a happy number.

7639389 is a `hidden beast` number, since 7 + 639 + 3 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 3404025 = 2058^2 + 1845^2 .

It is not a de Polignac number, because 7639389 - 2⁹ = 7638877 is a prime.

It is a Curzon number.

7639389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7639309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1189 + ... + 4085.

It is an arithmetic number, because the mean of its divisors is an integer number (923013).

Almost surely, 2^7639389 is an apocalyptic number.

It is an amenable number.

7639389 is a deficient number, since it is larger than the sum of its proper divisors (3436767).

7639389 is a wasteful number, since it uses less digits than its factorization.

7639389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196 (or 3193 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 7639389 is about 2763.9444639862. The cubic root of 7639389 is about 196.9485895720.

The spelling of 7639389 in words is "seven million, six hundred thirty-nine thousand, three hundred eighty-nine".