28076813 has 16 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 24883056.

The previous prime is 28076801. The next prime is 28076831. The reversal of 28076813 is 31867082.

It is not a de Polignac number, because 28076813 - 2⁸ = 28076557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28076833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19856 + ... + 21222.

It is an arithmetic number, because the mean of its divisors is an integer number (1969920).

Almost surely, 2^28076813 is an apocalyptic number.

28076813 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28076813 is a deficient number, since it is larger than the sum of its proper divisors (3441907).

28076813 is a wasteful number, since it uses less digits than its factorization.

28076813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28076813 is about 5298.7557973547. The cubic root of 28076813 is about 303.9363216404.

The spelling of 28076813 in words is "twenty-eight million, seventy-six thousand, eight hundred thirteen".