28892789 has 2 divisors, whose sum is σ = 28892790. Its totient is φ = 28892788.

The previous prime is 28892753. The next prime is 28892803. The reversal of 28892789 is 98729882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17556100 + 11336689 = 4190^2 + 3367^2 .

It is a cyclic number.

It is not a de Polignac number, because 28892789 - 2⁸ = 28892533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28892789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28892719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14446394 + 14446395.

It is an arithmetic number, because the mean of its divisors is an integer number (14446395).

Almost surely, 2^28892789 is an apocalyptic number.

It is an amenable number.

28892789 is a deficient number, since it is larger than the sum of its proper divisors (1).

28892789 is an equidigital number, since it uses as much as digits as its factorization.

28892789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 53.

The square root of 28892789 is about 5375.2012985562. The cubic root of 28892789 is about 306.8526102687.

The spelling of 28892789 in words is "twenty-eight million, eight hundred ninety-two thousand, seven hundred eighty-nine".