28216719 has 24 divisors (see below), whose sum is σ = 43366752. Its totient is φ = 17617920.

The previous prime is 28216711. The next prime is 28216751. The reversal of 28216719 is 91761282.

It is not a de Polignac number, because 28216719 - 2³ = 28216711 is a prime.

It is a super-2 number, since 2×28216719² = 1592366462249922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28216711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47287 + ... + 47879.

It is an arithmetic number, because the mean of its divisors is an integer number (1806948).

Almost surely, 2^28216719 is an apocalyptic number.

28216719 is a deficient number, since it is larger than the sum of its proper divisors (15150033).

28216719 is a wasteful number, since it uses less digits than its factorization.

28216719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 924 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 28216719 is about 5311.9411706080. The cubic root of 28216719 is about 304.4403209177.

The spelling of 28216719 in words is "twenty-eight million, two hundred sixteen thousand, seven hundred nineteen".