28192949 has 2 divisors, whose sum is σ = 28192950. Its totient is φ = 28192948.

The previous prime is 28192939. The next prime is 28192991. The reversal of 28192949 is 94929182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 208849 = 5290^2 + 457^2 .

It is a cyclic number.

It is not a de Polignac number, because 28192949 - 2⁴ = 28192933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28192909) 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, 14096474 + 14096475.

It is an arithmetic number, because the mean of its divisors is an integer number (14096475).

Almost surely, 2^28192949 is an apocalyptic number.

It is an amenable number.

28192949 is a deficient number, since it is larger than the sum of its proper divisors (1).

28192949 is an equidigital number, since it uses as much as digits as its factorization.

28192949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 28192949 is about 5309.7032873787. The cubic root of 28192949 is about 304.3548092107.

The spelling of 28192949 in words is "twenty-eight million, one hundred ninety-two thousand, nine hundred forty-nine".