28827313 has 4 divisors (see below), whose sum is σ = 30344560. Its totient is φ = 27310068.

The previous prime is 28827307. The next prime is 28827347. The reversal of 28827313 is 31372882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31372882 = 2 ⋅15686441.

It is not a de Polignac number, because 28827313 - 2⁹ = 28826801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28827913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758595 + ... + 758632.

It is an arithmetic number, because the mean of its divisors is an integer number (7586140).

Almost surely, 2^28827313 is an apocalyptic number.

It is an amenable number.

28827313 is a deficient number, since it is larger than the sum of its proper divisors (1517247).

28827313 is a wasteful number, since it uses less digits than its factorization.

28827313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517246.

The product of its digits is 16128, while the sum is 34.

The square root of 28827313 is about 5369.1072814761. The cubic root of 28827313 is about 306.6206414597.

The spelling of 28827313 in words is "twenty-eight million, eight hundred twenty-seven thousand, three hundred thirteen".