8739428 has 12 divisors (see below), whose sum is σ = 16193772. Its totient is φ = 4112640.

The previous prime is 8739397. The next prime is 8739431. The reversal of 8739428 is 8249378.

8739428 is digitally balanced in base 5, 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 5943844 + 2795584 = 2438^2 + 1672^2 .

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64193 + ... + 64328.

It is an arithmetic number, because the mean of its divisors is an integer number (1349481).

Almost surely, 2^8739428 is an apocalyptic number.

It is an amenable number.

8739428 is a deficient number, since it is larger than the sum of its proper divisors (7454344).

8739428 is a wasteful number, since it uses less digits than its factorization.

8739428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128542 (or 128540 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 8739428 is about 2956.2523572929. The cubic root of 8739428 is about 205.9812406331.

It can be divided in two parts, 873 and 9428, that added together give a palindrome (10301).

The spelling of 8739428 in words is "eight million, seven hundred thirty-nine thousand, four hundred twenty-eight".