28063939 has 2 divisors, whose sum is σ = 28063940. Its totient is φ = 28063938.

The previous prime is 28063891. The next prime is 28063949. The reversal of 28063939 is 93936082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28063939 - 2⁷ = 28063811 is a prime.

It is not a weakly prime, because it can be changed into another prime (28063949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14031969 + 14031970.

It is an arithmetic number, because the mean of its divisors is an integer number (14031970).

Almost surely, 2^28063939 is an apocalyptic number.

28063939 is a deficient number, since it is larger than the sum of its proper divisors (1).

28063939 is an equidigital number, since it uses as much as digits as its factorization.

28063939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 28063939 is about 5297.5408445806. The cubic root of 28063939 is about 303.8898601182.

The spelling of 28063939 in words is "twenty-eight million, sixty-three thousand, nine hundred thirty-nine".