28182971 has 2 divisors, whose sum is σ = 28182972. Its totient is φ = 28182970.

The previous prime is 28182961. The next prime is 28182989. The reversal of 28182971 is 17928182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28182971 - 2¹⁰ = 28181947 is a prime.

It is not a weakly prime, because it can be changed into another prime (28182961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14091485 + 14091486.

It is an arithmetic number, because the mean of its divisors is an integer number (14091486).

Almost surely, 2^28182971 is an apocalyptic number.

28182971 is a deficient number, since it is larger than the sum of its proper divisors (1).

28182971 is an equidigital number, since it uses as much as digits as its factorization.

28182971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 28182971 is about 5308.7636037028. The cubic root of 28182971 is about 304.3188993972.

The spelling of 28182971 in words is "twenty-eight million, one hundred eighty-two thousand, nine hundred seventy-one".