28342415 has 4 divisors (see below), whose sum is σ = 34010904. Its totient is φ = 22673928.

The previous prime is 28342409. The next prime is 28342427. The reversal of 28342415 is 51424382.

It is a happy number.

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 28342415 - 2⁶ = 28342351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2834237 + ... + 2834246.

It is an arithmetic number, because the mean of its divisors is an integer number (8502726).

Almost surely, 2^28342415 is an apocalyptic number.

28342415 is a deficient number, since it is larger than the sum of its proper divisors (5668489).

28342415 is an equidigital number, since it uses as much as digits as its factorization.

28342415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5668488.

The product of its digits is 7680, while the sum is 29.

The square root of 28342415 is about 5323.7594799164. The cubic root of 28342415 is about 304.8917110867.

Adding to 28342415 its reverse (51424382), we get a palindrome (79766797).

The spelling of 28342415 in words is "twenty-eight million, three hundred forty-two thousand, four hundred fifteen".