28889573 has 2 divisors, whose sum is σ = 28889574. Its totient is φ = 28889572.

The previous prime is 28889569. The next prime is 28889599. The reversal of 28889573 is 37598882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25381444 + 3508129 = 5038^2 + 1873^2 .

It is a cyclic number.

It is not a de Polignac number, because 28889573 - 2² = 28889569 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28889503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14444786 + 14444787.

It is an arithmetic number, because the mean of its divisors is an integer number (14444787).

Almost surely, 2^28889573 is an apocalyptic number.

It is an amenable number.

28889573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28889573 is an equidigital number, since it uses as much as digits as its factorization.

28889573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 28889573 is about 5374.9021386440. The cubic root of 28889573 is about 306.8412247910.

The spelling of 28889573 in words is "twenty-eight million, eight hundred eighty-nine thousand, five hundred seventy-three".