28343751 has 32 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 17149440.

The previous prime is 28343729. The next prime is 28343767. The reversal of 28343751 is 15734382.

It is not a de Polignac number, because 28343751 - 2⁵ = 28343719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121531 + ... + 121763.

It is an arithmetic number, because the mean of its divisors is an integer number (1297296).

Almost surely, 2^28343751 is an apocalyptic number.

28343751 is a deficient number, since it is larger than the sum of its proper divisors (13169721).

28343751 is a wasteful number, since it uses less digits than its factorization.

28343751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343.

The product of its digits is 20160, while the sum is 33.

The square root of 28343751 is about 5323.8849536781. The cubic root of 28343751 is about 304.8965016562.

The spelling of 28343751 in words is "twenty-eight million, three hundred forty-three thousand, seven hundred fifty-one".