28192739 has 2 divisors, whose sum is σ = 28192740. Its totient is φ = 28192738.

The previous prime is 28192699. The next prime is 28192763. The reversal of 28192739 is 93729182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28192739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28192696 and 28192705.

It is not a weakly prime, because it can be changed into another prime (28192799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14096369 + 14096370.

It is an arithmetic number, because the mean of its divisors is an integer number (14096370).

Almost surely, 2^28192739 is an apocalyptic number.

28192739 is a deficient number, since it is larger than the sum of its proper divisors (1).

28192739 is an equidigital number, since it uses as much as digits as its factorization.

28192739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 28192739 is about 5309.6835122256. The cubic root of 28192739 is about 304.3540535292.

The spelling of 28192739 in words is "twenty-eight million, one hundred ninety-two thousand, seven hundred thirty-nine".