6928736391 has 6 divisors (see below), whose sum is σ = 10008174800. Its totient is φ = 4619157588.

The previous prime is 6928736389. The next prime is 6928736413. The reversal of 6928736391 is 1936378296.

It is not a de Polignac number, because 6928736391 - 2¹ = 6928736389 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 (6928736341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 384929791 + ... + 384929808.

Almost surely, 2^6928736391 is an apocalyptic number.

6928736391 is a deficient number, since it is larger than the sum of its proper divisors (3079438409).

6928736391 is a wasteful number, since it uses less digits than its factorization.

6928736391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769859605 (or 769859602 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 6928736391 is about 83239.0316558284. The cubic root of 6928736391 is about 1906.4174863485.

The spelling of 6928736391 in words is "six billion, nine hundred twenty-eight million, seven hundred thirty-six thousand, three hundred ninety-one".