28992923 has 2 divisors, whose sum is σ = 28992924. Its totient is φ = 28992922.

The previous prime is 28992913. The next prime is 28992947. The reversal of 28992923 is 32929982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28992923 is a prime.

It is not a weakly prime, because it can be changed into another prime (28992913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14496461 + 14496462.

It is an arithmetic number, because the mean of its divisors is an integer number (14496462).

Almost surely, 2^28992923 is an apocalyptic number.

28992923 is a deficient number, since it is larger than the sum of its proper divisors (1).

28992923 is an equidigital number, since it uses as much as digits as its factorization.

28992923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 28992923 is about 5384.5076840877. The cubic root of 28992923 is about 307.2066888271.

The spelling of 28992923 in words is "twenty-eight million, nine hundred ninety-two thousand, nine hundred twenty-three".