28929347 has 2 divisors, whose sum is σ = 28929348. Its totient is φ = 28929346.

The previous prime is 28929337. The next prime is 28929353. The reversal of 28929347 is 74392982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28929347 - 2⁶ = 28929283 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28929298 and 28929307.

It is not a weakly prime, because it can be changed into another prime (28929317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14464673 + 14464674.

It is an arithmetic number, because the mean of its divisors is an integer number (14464674).

Almost surely, 2^28929347 is an apocalyptic number.

28929347 is a deficient number, since it is larger than the sum of its proper divisors (1).

28929347 is an equidigital number, since it uses as much as digits as its factorization.

28929347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 28929347 is about 5378.6008403673. The cubic root of 28929347 is about 306.9819757621.

The spelling of 28929347 in words is "twenty-eight million, nine hundred twenty-nine thousand, three hundred forty-seven".