28302413 has 4 divisors (see below), whose sum is σ = 28904640. Its totient is φ = 27700188.

The previous prime is 28302409. The next prime is 28302437. The reversal of 28302413 is 31420382.

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.

It is a cyclic number.

It is not a de Polignac number, because 28302413 - 2² = 28302409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28302403) 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, 301043 + ... + 301136.

It is an arithmetic number, because the mean of its divisors is an integer number (7226160).

Almost surely, 2^28302413 is an apocalyptic number.

It is an amenable number.

28302413 is a deficient number, since it is larger than the sum of its proper divisors (602227).

28302413 is an equidigital number, since it uses as much as digits as its factorization.

28302413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602226.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28302413 is about 5320.0012218044. The cubic root of 28302413 is about 304.7482039015.

Adding to 28302413 its reverse (31420382), we get a palindrome (59722795).

The spelling of 28302413 in words is "twenty-eight million, three hundred two thousand, four hundred thirteen".