28794281 has 2 divisors, whose sum is σ = 28794282. Its totient is φ = 28794280.

The previous prime is 28794239. The next prime is 28794287. The reversal of 28794281 is 18249782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26419600 + 2374681 = 5140^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 28794281 - 2⁶ = 28794217 is a prime.

It is a super-2 number, since 2×28794281² = 1658221236613922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28794287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14397140 + 14397141.

It is an arithmetic number, because the mean of its divisors is an integer number (14397141).

Almost surely, 2^28794281 is an apocalyptic number.

It is an amenable number.

28794281 is a deficient number, since it is larger than the sum of its proper divisors (1).

28794281 is an equidigital number, since it uses as much as digits as its factorization.

28794281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 28794281 is about 5366.0302831795. The cubic root of 28794281 is about 306.5034821530.

The spelling of 28794281 in words is "twenty-eight million, seven hundred ninety-four thousand, two hundred eighty-one".