28104919 has 8 divisors (see below), whose sum is σ = 29952000. Its totient is φ = 26309976.

The previous prime is 28104911. The next prime is 28104997. The reversal of 28104919 is 91940182.

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

It is not a de Polignac number, because 28104919 - 2³ = 28104911 is a prime.

It is a super-2 number, since 2×28104919² = 1579772943993122, 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 (28104911) 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, 11919 + ... + 14080.

It is an arithmetic number, because the mean of its divisors is an integer number (3744000).

Almost surely, 2^28104919 is an apocalyptic number.

28104919 is a deficient number, since it is larger than the sum of its proper divisors (1847081).

28104919 is a wasteful number, since it uses less digits than its factorization.

28104919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26069.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 28104919 is about 5301.4072660002. The cubic root of 28104919 is about 304.0377052436.

The spelling of 28104919 in words is "twenty-eight million, one hundred four thousand, nine hundred nineteen".