28304326 has 4 divisors (see below), whose sum is σ = 42456492. Its totient is φ = 14152162.

The previous prime is 28304321. The next prime is 28304327. The reversal of 28304326 is 62340382.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28304326² = 1602269740628552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28304294 and 28304303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7076080 + ... + 7076083.

It is an arithmetic number, because the mean of its divisors is an integer number (10614123).

Almost surely, 2^28304326 is an apocalyptic number.

28304326 is a deficient number, since it is larger than the sum of its proper divisors (14152166).

28304326 is a wasteful number, since it uses less digits than its factorization.

28304326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14152165.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 28304326 is about 5320.1810119581. The cubic root of 28304326 is about 304.7550698670.

The spelling of 28304326 in words is "twenty-eight million, three hundred four thousand, three hundred twenty-six".