68828511 has 4 divisors (see below), whose sum is σ = 91771352. Its totient is φ = 45885672.

The previous prime is 68828483. The next prime is 68828521. The reversal of 68828511 is 11582886.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68828511 - 2⁶ = 68828447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68828511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68828521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11471416 + ... + 11471421.

It is an arithmetic number, because the mean of its divisors is an integer number (22942838).

Almost surely, 2^68828511 is an apocalyptic number.

68828511 is a deficient number, since it is larger than the sum of its proper divisors (22942841).

68828511 is a wasteful number, since it uses less digits than its factorization.

68828511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22942840.

The product of its digits is 30720, while the sum is 39.

The square root of 68828511 is about 8296.2950164516. The cubic root of 68828511 is about 409.8165171466.

The spelling of 68828511 in words is "sixty-eight million, eight hundred twenty-eight thousand, five hundred eleven".