28719719 has 8 divisors (see below), whose sum is σ = 32866848. Its totient is φ = 24583680.

The previous prime is 28719707. The next prime is 28719731. The reversal of 28719719 is 91791782.

It is an interprime number because it is at equal distance from previous prime (28719707) and next prime (28719731).

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

It is a cyclic number.

It is not a de Polignac number, because 28719719 - 2⁴ = 28719703 is a prime.

It is a super-2 number, since 2×28719719² = 1649644518877922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28719719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28719319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3839 + ... + 8495.

It is an arithmetic number, because the mean of its divisors is an integer number (4108356).

Almost surely, 2^28719719 is an apocalyptic number.

28719719 is a deficient number, since it is larger than the sum of its proper divisors (4147129).

28719719 is an equidigital number, since it uses as much as digits as its factorization.

28719719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545.

The product of its digits is 63504, while the sum is 44.

The square root of 28719719 is about 5359.0781856584. The cubic root of 28719719 is about 306.2386926826.

The spelling of 28719719 in words is "twenty-eight million, seven hundred nineteen thousand, seven hundred nineteen".