28819719 has 10 divisors (see below), whose sum is σ = 43051800. Its totient is φ = 19213092.

The previous prime is 28819711. The next prime is 28819727. The reversal of 28819719 is 91791882.

It is an interprime number because it is at equal distance from previous prime (28819711) and next prime (28819727).

It is not a de Polignac number, because 28819719 - 2³ = 28819711 is a prime.

It is a super-2 number, since 2×28819719² = 1661152406477922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28819711) 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 9 ways as a sum of consecutive naturals, for example, 177819 + ... + 177980.

It is an arithmetic number, because the mean of its divisors is an integer number (4305180).

Almost surely, 2^28819719 is an apocalyptic number.

28819719 is a deficient number, since it is larger than the sum of its proper divisors (14232081).

28819719 is an equidigital number, since it uses as much as digits as its factorization.

28819719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355811 (or 355802 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 28819719 is about 5368.4000409806. The cubic root of 28819719 is about 306.5937146624.

The spelling of 28819719 in words is "twenty-eight million, eight hundred nineteen thousand, seven hundred nineteen".