28051751 has 16 divisors (see below), whose sum is σ = 36558144. Its totient is φ = 20888064.

The previous prime is 28051747. The next prime is 28051753. The reversal of 28051751 is 15715082.

It is a cyclic number.

It is not a de Polignac number, because 28051751 - 2² = 28051747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28051753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7520 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (2284884).

Almost surely, 2^28051751 is an apocalyptic number.

28051751 is a deficient number, since it is larger than the sum of its proper divisors (8506393).

28051751 is a wasteful number, since it uses less digits than its factorization.

28051751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18170.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 28051751 is about 5296.3903745853. The cubic root of 28051751 is about 303.8458612350.

The spelling of 28051751 in words is "twenty-eight million, fifty-one thousand, seven hundred fifty-one".