28648619 has 8 divisors (see below), whose sum is σ = 30373248. Its totient is φ = 26974080.

The previous prime is 28648601. The next prime is 28648657. The reversal of 28648619 is 91684682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28648619 - 2¹² = 28644523 is a prime.

It is a super-2 number, since 2×28648619² = 1641486741214322, 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 28648619.

It is not an unprimeable number, because it can be changed into a prime (28648699) 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 7 ways as a sum of consecutive naturals, for example, 11342 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (3796656).

Almost surely, 2^28648619 is an apocalyptic number.

28648619 is a deficient number, since it is larger than the sum of its proper divisors (1724629).

28648619 is a wasteful number, since it uses less digits than its factorization.

28648619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25045.

The product of its digits is 165888, while the sum is 44.

The square root of 28648619 is about 5352.4404714111. The cubic root of 28648619 is about 305.9857704805.

The spelling of 28648619 in words is "twenty-eight million, six hundred forty-eight thousand, six hundred nineteen".