28313519 has 4 divisors (see below), whose sum is σ = 30491496. Its totient is φ = 26135544.

The previous prime is 28313503. The next prime is 28313531. The reversal of 28313519 is 91531382.

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 28313519 - 2⁴ = 28313503 is a prime.

It is a super-2 number, since 2×28313519² = 1603310716326722, 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 (28313119) 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, 1088969 + ... + 1088994.

It is an arithmetic number, because the mean of its divisors is an integer number (7622874).

Almost surely, 2^28313519 is an apocalyptic number.

28313519 is a deficient number, since it is larger than the sum of its proper divisors (2177977).

28313519 is a wasteful number, since it uses less digits than its factorization.

28313519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177976.

The product of its digits is 6480, while the sum is 32.

The square root of 28313519 is about 5321.0449161795. The cubic root of 28313519 is about 304.7880602316.

The spelling of 28313519 in words is "twenty-eight million, three hundred thirteen thousand, five hundred nineteen".