28816541 has 4 divisors (see below), whose sum is σ = 31033212. Its totient is φ = 26599872.

The previous prime is 28816523. The next prime is 28816549. The reversal of 28816541 is 14561882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14561882 = 2 ⋅7280941.

It can be written as a sum of positive squares in 2 ways, for example, as 14032516 + 14784025 = 3746^2 + 3845^2 .

It is not a de Polignac number, because 28816541 - 2⁶ = 28816477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816549) 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, 1108316 + ... + 1108341.

It is an arithmetic number, because the mean of its divisors is an integer number (7758303).

Almost surely, 2^28816541 is an apocalyptic number.

It is an amenable number.

28816541 is a deficient number, since it is larger than the sum of its proper divisors (2216671).

28816541 is a wasteful number, since it uses less digits than its factorization.

28816541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216670.

The product of its digits is 15360, while the sum is 35.

The square root of 28816541 is about 5368.1040414657. The cubic root of 28816541 is about 306.5824447093.

The spelling of 28816541 in words is "twenty-eight million, eight hundred sixteen thousand, five hundred forty-one".