28219783 has 2 divisors, whose sum is σ = 28219784. Its totient is φ = 28219782.

The previous prime is 28219757. The next prime is 28219817. The reversal of 28219783 is 38791282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28219783 - 2¹³ = 28211591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28219753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14109891 + 14109892.

It is an arithmetic number, because the mean of its divisors is an integer number (14109892).

Almost surely, 2^28219783 is an apocalyptic number.

28219783 is a deficient number, since it is larger than the sum of its proper divisors (1).

28219783 is an equidigital number, since it uses as much as digits as its factorization.

28219783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 28219783 is about 5312.2295695875. The cubic root of 28219783 is about 304.4513400512.

The spelling of 28219783 in words is "twenty-eight million, two hundred nineteen thousand, seven hundred eighty-three".