28992787 has 2 divisors, whose sum is σ = 28992788. Its totient is φ = 28992786.

The previous prime is 28992767. The next prime is 28992791. The reversal of 28992787 is 78729982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28992787 - 2¹¹ = 28990739 is a prime.

It is not a weakly prime, because it can be changed into another prime (28992767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14496393 + 14496394.

It is an arithmetic number, because the mean of its divisors is an integer number (14496394).

Almost surely, 2^28992787 is an apocalyptic number.

28992787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28992787 is an equidigital number, since it uses as much as digits as its factorization.

28992787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The square root of 28992787 is about 5384.4950552489. The cubic root of 28992787 is about 307.2062084780.

The spelling of 28992787 in words is "twenty-eight million, nine hundred ninety-two thousand, seven hundred eighty-seven".