28773427 has 2 divisors, whose sum is σ = 28773428. Its totient is φ = 28773426.

The previous prime is 28773419. The next prime is 28773439. The reversal of 28773427 is 72437782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28773427 - 2³ = 28773419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28773427.

It is not a weakly prime, because it can be changed into another prime (28773497) 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, 14386713 + 14386714.

It is an arithmetic number, because the mean of its divisors is an integer number (14386714).

Almost surely, 2^28773427 is an apocalyptic number.

28773427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28773427 is an equidigital number, since it uses as much as digits as its factorization.

28773427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 40.

The square root of 28773427 is about 5364.0867815501. The cubic root of 28773427 is about 306.4294701491.

The spelling of 28773427 in words is "twenty-eight million, seven hundred seventy-three thousand, four hundred twenty-seven".