28739519 has 2 divisors, whose sum is σ = 28739520. Its totient is φ = 28739518.

The previous prime is 28739507. The next prime is 28739569. The reversal of 28739519 is 91593782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28739519 - 2²⁴ = 11962303 is a prime.

It is a super-2 number, since 2×28739519² = 1651919904702722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28739519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28739569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14369759 + 14369760.

It is an arithmetic number, because the mean of its divisors is an integer number (14369760).

Almost surely, 2^28739519 is an apocalyptic number.

28739519 is a deficient number, since it is larger than the sum of its proper divisors (1).

28739519 is an equidigital number, since it uses as much as digits as its factorization.

28739519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 28739519 is about 5360.9252000005. The cubic root of 28739519 is about 306.3090523915.

The spelling of 28739519 in words is "twenty-eight million, seven hundred thirty-nine thousand, five hundred nineteen".