28348751 has 4 divisors (see below), whose sum is σ = 28518672. Its totient is φ = 28178832.

The previous prime is 28348729. The next prime is 28348769. The reversal of 28348751 is 15784382.

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

It is a cyclic number.

It is not a de Polignac number, because 28348751 - 2¹⁰ = 28347727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28348711) 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, 84710 + ... + 85043.

It is an arithmetic number, because the mean of its divisors is an integer number (7129668).

Almost surely, 2^28348751 is an apocalyptic number.

28348751 is a deficient number, since it is larger than the sum of its proper divisors (169921).

28348751 is a wasteful number, since it uses less digits than its factorization.

28348751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169920.

The product of its digits is 53760, while the sum is 38.

The square root of 28348751 is about 5324.3545148684. The cubic root of 28348751 is about 304.9144290984.

The spelling of 28348751 in words is "twenty-eight million, three hundred forty-eight thousand, seven hundred fifty-one".