28771583 has 2 divisors, whose sum is σ = 28771584. Its totient is φ = 28771582.

The previous prime is 28771577. The next prime is 28771591. The reversal of 28771583 is 38517782.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28771583 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28771583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28771553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14385791 + 14385792.

It is an arithmetic number, because the mean of its divisors is an integer number (14385792).

Almost surely, 2^28771583 is an apocalyptic number.

28771583 is a deficient number, since it is larger than the sum of its proper divisors (1).

28771583 is an equidigital number, since it uses as much as digits as its factorization.

28771583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 41.

The square root of 28771583 is about 5363.9148949252. The cubic root of 28771583 is about 306.4229239700.

The spelling of 28771583 in words is "twenty-eight million, seven hundred seventy-one thousand, five hundred eighty-three".