28048319 has 4 divisors (see below), whose sum is σ = 30205896. Its totient is φ = 25890744.

The previous prime is 28048301. The next prime is 28048327. The reversal of 28048319 is 91384082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91384082 = 2 ⋅45692041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28048319 is a prime.

It is a super-2 number, since 2×28048319² = 1573416397451522, 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 (28048369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078769 + ... + 1078794.

It is an arithmetic number, because the mean of its divisors is an integer number (7551474).

Almost surely, 2^28048319 is an apocalyptic number.

28048319 is a deficient number, since it is larger than the sum of its proper divisors (2157577).

28048319 is a wasteful number, since it uses less digits than its factorization.

28048319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157576.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28048319 is about 5296.0663704300. The cubic root of 28048319 is about 303.8334693582.

The spelling of 28048319 in words is "twenty-eight million, forty-eight thousand, three hundred nineteen".