28973771 has 2 divisors, whose sum is σ = 28973772. Its totient is φ = 28973770.

The previous prime is 28973759. The next prime is 28973837. The reversal of 28973771 is 17737982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28973771 - 2¹⁰ = 28972747 is a prime.

It is not a weakly prime, because it can be changed into another prime (28973741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14486885 + 14486886.

It is an arithmetic number, because the mean of its divisors is an integer number (14486886).

Almost surely, 2^28973771 is an apocalyptic number.

28973771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28973771 is an equidigital number, since it uses as much as digits as its factorization.

28973771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 44.

The square root of 28973771 is about 5382.7289547218. The cubic root of 28973771 is about 307.1390295745.

The spelling of 28973771 in words is "twenty-eight million, nine hundred seventy-three thousand, seven hundred seventy-one".