6428238685 has 16 divisors (see below), whose sum is σ = 8435753280. Its totient is φ = 4663635840.

The previous prime is 6428238671. The next prime is 6428238701. The reversal of 6428238685 is 5868328246.

It is not a de Polignac number, because 6428238685 - 2¹¹ = 6428236637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120387 + ... + 165376.

It is an arithmetic number, because the mean of its divisors is an integer number (527234580).

Almost surely, 2^6428238685 is an apocalyptic number.

It is an amenable number.

6428238685 is a deficient number, since it is larger than the sum of its proper divisors (2007514595).

6428238685 is a wasteful number, since it uses less digits than its factorization.

6428238685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286188.

The product of its digits is 4423680, while the sum is 52.

The square root of 6428238685 is about 80176.2975261392. The cubic root of 6428238685 is about 1859.3622013515.

The spelling of 6428238685 in words is "six billion, four hundred twenty-eight million, two hundred thirty-eight thousand, six hundred eighty-five".