28057739 has 2 divisors, whose sum is σ = 28057740. Its totient is φ = 28057738.

The previous prime is 28057721. The next prime is 28057741. The reversal of 28057739 is 93775082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28057739 - 2⁸ = 28057483 is a prime.

Together with 28057741, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28057696 and 28057705.

It is not a weakly prime, because it can be changed into another prime (28057789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028869 + 14028870.

It is an arithmetic number, because the mean of its divisors is an integer number (14028870).

Almost surely, 2^28057739 is an apocalyptic number.

28057739 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057739 is an equidigital number, since it uses as much as digits as its factorization.

28057739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 28057739 is about 5296.9556350795. The cubic root of 28057739 is about 303.8674796071.

The spelling of 28057739 in words is "twenty-eight million, fifty-seven thousand, seven hundred thirty-nine".