28912283 has 2 divisors, whose sum is σ = 28912284. Its totient is φ = 28912282.

The previous prime is 28912277. The next prime is 28912321. The reversal of 28912283 is 38221982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28912283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28912883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14456141 + 14456142.

It is an arithmetic number, because the mean of its divisors is an integer number (14456142).

Almost surely, 2^28912283 is an apocalyptic number.

28912283 is a deficient number, since it is larger than the sum of its proper divisors (1).

28912283 is an equidigital number, since it uses as much as digits as its factorization.

28912283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 28912283 is about 5377.0143202339. The cubic root of 28912283 is about 306.9216060307.

The spelling of 28912283 in words is "twenty-eight million, nine hundred twelve thousand, two hundred eighty-three".