28357019 has 2 divisors, whose sum is σ = 28357020. Its totient is φ = 28357018.

The previous prime is 28356997. The next prime is 28357057. The reversal of 28357019 is 91075382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28357019 - 2²⁴ = 11579803 is a prime.

It is a super-2 number, since 2×28357019² = 1608241053132722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28357019.

It is not a weakly prime, because it can be changed into another prime (28357319) 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, 14178509 + 14178510.

It is an arithmetic number, because the mean of its divisors is an integer number (14178510).

Almost surely, 2^28357019 is an apocalyptic number.

28357019 is a deficient number, since it is larger than the sum of its proper divisors (1).

28357019 is an equidigital number, since it uses as much as digits as its factorization.

28357019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 28357019 is about 5325.1308904101. The cubic root of 28357019 is about 304.9440692926.

The spelling of 28357019 in words is "twenty-eight million, three hundred fifty-seven thousand, nineteen".