28419719 has 4 divisors (see below), whose sum is σ = 28545144. Its totient is φ = 28294296.

The previous prime is 28419707. The next prime is 28419731. The reversal of 28419719 is 91791482.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28419707) and next prime (28419731).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28419719 is a prime.

It is a super-2 number, since 2×28419719² = 1615360856077922, 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 (28419799) 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 3 ways as a sum of consecutive naturals, for example, 62372 + ... + 62825.

It is an arithmetic number, because the mean of its divisors is an integer number (7136286).

Almost surely, 2^28419719 is an apocalyptic number.

28419719 is a deficient number, since it is larger than the sum of its proper divisors (125425).

28419719 is a wasteful number, since it uses less digits than its factorization.

28419719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125424.

The product of its digits is 36288, while the sum is 41.

The square root of 28419719 is about 5331.0148189627. The cubic root of 28419719 is about 305.1686570558.

The spelling of 28419719 in words is "twenty-eight million, four hundred nineteen thousand, seven hundred nineteen".