28098719 has 4 divisors (see below), whose sum is σ = 30653160. Its totient is φ = 25544280.

The previous prime is 28098703. The next prime is 28098727. The reversal of 28098719 is 91789082.

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

It is a cyclic number.

It is not a de Polignac number, because 28098719 - 2⁴ = 28098703 is a prime.

It is a super-2 number, since 2×28098719² = 1579076018881922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28098719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28098769) 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, 1277204 + ... + 1277225.

It is an arithmetic number, because the mean of its divisors is an integer number (7663290).

Almost surely, 2^28098719 is an apocalyptic number.

28098719 is a deficient number, since it is larger than the sum of its proper divisors (2554441).

28098719 is a wasteful number, since it uses less digits than its factorization.

28098719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554440.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 28098719 is about 5300.8224833511. The cubic root of 28098719 is about 304.0153464956.

The spelling of 28098719 in words is "twenty-eight million, ninety-eight thousand, seven hundred nineteen".