28786719 has 8 divisors (see below), whose sum is σ = 41334832. Its totient is φ = 17714880.

The previous prime is 28786711. The next prime is 28786721. The reversal of 28786719 is 91768782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28786719 - 2³ = 28786711 is a prime.

It is a super-2 number, since 2×28786719² = 1657350381569922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28786711) 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 in 7 ways as a sum of consecutive naturals, for example, 369022 + ... + 369099.

It is an arithmetic number, because the mean of its divisors is an integer number (5166854).

Almost surely, 2^28786719 is an apocalyptic number.

28786719 is a deficient number, since it is larger than the sum of its proper divisors (12548113).

28786719 is a wasteful number, since it uses less digits than its factorization.

28786719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738137.

The product of its digits is 338688, while the sum is 48.

The square root of 28786719 is about 5365.3256191959. The cubic root of 28786719 is about 306.4766483260.

The spelling of 28786719 in words is "twenty-eight million, seven hundred eighty-six thousand, seven hundred nineteen".