28816741 has 4 divisors (see below), whose sum is σ = 28940652. Its totient is φ = 28692832.

The previous prime is 28816703. The next prime is 28816759. The reversal of 28816741 is 14761882.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14025025 + 14791716 = 3745^2 + 3846^2 .

It is a cyclic number.

It is not a de Polignac number, because 28816741 - 2¹¹ = 28814693 is a prime.

It is a super-2 number, since 2×28816741² = 1660809123722162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28816741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816771) 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, 61606 + ... + 62071.

It is an arithmetic number, because the mean of its divisors is an integer number (7235163).

Almost surely, 2^28816741 is an apocalyptic number.

It is an amenable number.

28816741 is a deficient number, since it is larger than the sum of its proper divisors (123911).

28816741 is a wasteful number, since it uses less digits than its factorization.

28816741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123910.

The product of its digits is 21504, while the sum is 37.

The square root of 28816741 is about 5368.1226699844. The cubic root of 28816741 is about 306.5831539819.

The spelling of 28816741 in words is "twenty-eight million, eight hundred sixteen thousand, seven hundred forty-one".