28340313 has 8 divisors (see below), whose sum is σ = 37983648. Its totient is φ = 18795264.

The previous prime is 28340251. The next prime is 28340329. The reversal of 28340313 is 31304382.

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

It is not a de Polignac number, because 28340313 - 2¹⁴ = 28323929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28340383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23895 + ... + 25052.

It is an arithmetic number, because the mean of its divisors is an integer number (4747956).

Almost surely, 2^28340313 is an apocalyptic number.

It is an amenable number.

28340313 is a deficient number, since it is larger than the sum of its proper divisors (9643335).

28340313 is a wasteful number, since it uses less digits than its factorization.

28340313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49143.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 28340313 is about 5323.5620593734. The cubic root of 28340313 is about 304.8841735237.

Adding to 28340313 its reverse (31304382), we get a palindrome (59644695).

The spelling of 28340313 in words is "twenty-eight million, three hundred forty thousand, three hundred thirteen".