28912099 has 2 divisors, whose sum is σ = 28912100. Its totient is φ = 28912098.

The previous prime is 28912049. The next prime is 28912151. The reversal of 28912099 is 99021982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28912099 - 2¹¹ = 28910051 is a prime.

It is not a weakly prime, because it can be changed into another prime (28912049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14456049 + 14456050.

It is an arithmetic number, because the mean of its divisors is an integer number (14456050).

Almost surely, 2^28912099 is an apocalyptic number.

28912099 is a deficient number, since it is larger than the sum of its proper divisors (1).

28912099 is an equidigital number, since it uses as much as digits as its factorization.

28912099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 28912099 is about 5376.9972103396. The cubic root of 28912099 is about 306.9209549384.

The spelling of 28912099 in words is "twenty-eight million, nine hundred twelve thousand, ninety-nine".