7936389 has 12 divisors (see below), whose sum is σ = 11773996. Its totient is φ = 5147712.

The previous prime is 7936367. The next prime is 7936421. The reversal of 7936389 is 9836397.

It is a happy number.

7936389 is a `hidden beast` number, since 7 + 9 + 3 + 638 + 9 = 666.

7936389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7049025 + 887364 = 2655^2 + 942^2 .

It is not a de Polignac number, because 7936389 - 2²⁰ = 6887813 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 (7936349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11584 + ... + 12249.

Almost surely, 2^7936389 is an apocalyptic number.

It is an amenable number.

7936389 is a deficient number, since it is larger than the sum of its proper divisors (3837607).

7936389 is a wasteful number, since it uses less digits than its factorization.

7936389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23876 (or 23873 counting only the distinct ones).

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

The square root of 7936389 is about 2817.1597398799. The cubic root of 7936389 is about 199.4684971079.

It can be divided in two parts, 7 and 936389, that added together give a triangular number (936396 = T₁₃₆₈).

The spelling of 7936389 in words is "seven million, nine hundred thirty-six thousand, three hundred eighty-nine".