28068831 has 12 divisors (see below), whose sum is σ = 46335952. Its totient is φ = 16039296.

The previous prime is 28068791. The next prime is 28068841. The reversal of 28068831 is 13886082.

It is not a de Polignac number, because 28068831 - 2⁹ = 28068319 is a prime.

It is a super-2 number, since 2×28068831² = 1575718547413122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28068841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222706 + ... + 222831.

Almost surely, 2^28068831 is an apocalyptic number.

28068831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28068831 is a deficient number, since it is larger than the sum of its proper divisors (18267121).

28068831 is a wasteful number, since it uses less digits than its factorization.

28068831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445550 (or 445547 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28068831 is about 5298.0025481308. The cubic root of 28068831 is about 303.9075167371.

The spelling of 28068831 in words is "twenty-eight million, sixty-eight thousand, eight hundred thirty-one".