28190339 has 2 divisors, whose sum is σ = 28190340. Its totient is φ = 28190338.

The previous prime is 28190311. The next prime is 28190359. The reversal of 28190339 is 93309182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28190339 - 2²⁴ = 11413123 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 28190299 and 28190308.

It is not a weakly prime, because it can be changed into another prime (28190359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14095169 + 14095170.

It is an arithmetic number, because the mean of its divisors is an integer number (14095170).

Almost surely, 2^28190339 is an apocalyptic number.

28190339 is a deficient number, since it is larger than the sum of its proper divisors (1).

28190339 is an equidigital number, since it uses as much as digits as its factorization.

28190339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 28190339 is about 5309.4575052448. The cubic root of 28190339 is about 304.3454169028.

The spelling of 28190339 in words is "twenty-eight million, one hundred ninety thousand, three hundred thirty-nine".