28192691 has 2 divisors, whose sum is σ = 28192692. Its totient is φ = 28192690.

The previous prime is 28192667. The next prime is 28192699. The reversal of 28192691 is 19629182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28192691 - 2⁶ = 28192627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28192699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14096345 + 14096346.

It is an arithmetic number, because the mean of its divisors is an integer number (14096346).

Almost surely, 2^28192691 is an apocalyptic number.

28192691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28192691 is an equidigital number, since it uses as much as digits as its factorization.

28192691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 28192691 is about 5309.6789921802. The cubic root of 28192691 is about 304.3538808015.

The spelling of 28192691 in words is "twenty-eight million, one hundred ninety-two thousand, six hundred ninety-one".