6939728 has 20 divisors (see below), whose sum is σ = 13579488. Its totient is φ = 3435360.

The previous prime is 6939697. The next prime is 6939733. The reversal of 6939728 is 8279396.

It is a d-powerful number, because it can be written as 6 + 9² + 3¹⁴ + 9⁵ + 7³ + 2⁷ + 8⁷ .

It is a congruent number.

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, 458 + ... + 3753.

Almost surely, 2^6939728 is an apocalyptic number.

It is an amenable number.

6939728 is a deficient number, since it is larger than the sum of its proper divisors (6639760).

6939728 is a wasteful number, since it uses less digits than its factorization.

6939728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322 (or 4316 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 6939728 is about 2634.3363490640. The cubic root of 6939728 is about 190.7425054613.

It can be divided in two parts, 6939 and 728, that added together give a palindrome (7667).

The spelling of 6939728 in words is "six million, nine hundred thirty-nine thousand, seven hundred twenty-eight".