28816745 has 4 divisors (see below), whose sum is σ = 34580100. Its totient is φ = 23053392.

The previous prime is 28816703. The next prime is 28816759. The reversal of 28816745 is 54761882.

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 6130576 + 22686169 = 2476^2 + 4763^2 .

It is a cyclic number.

It is not a de Polignac number, because 28816745 - 2¹² = 28812649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881670 + ... + 2881679.

It is an arithmetic number, because the mean of its divisors is an integer number (8645025).

Almost surely, 2^28816745 is an apocalyptic number.

It is an amenable number.

28816745 is a deficient number, since it is larger than the sum of its proper divisors (5763355).

28816745 is an equidigital number, since it uses as much as digits as its factorization.

28816745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763354.

The product of its digits is 107520, while the sum is 41.

The square root of 28816745 is about 5368.1230425541. The cubic root of 28816745 is about 306.5831681673.

The spelling of 28816745 in words is "twenty-eight million, eight hundred sixteen thousand, seven hundred forty-five".