28456306 has 8 divisors (see below), whose sum is σ = 42906204. Its totient is φ = 14154240.

The previous prime is 28456289. The next prime is 28456321. The reversal of 28456306 is 60365482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26471025 + 1985281 = 5145^2 + 1409^2 .

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

It is a super-2 number, since 2×28456306² = 1619522702331272, which contains 22 as substring.

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, 36475 + ... + 37246.

Almost surely, 2^28456306 is an apocalyptic number.

28456306 is a deficient number, since it is larger than the sum of its proper divisors (14449898).

28456306 is a wasteful number, since it uses less digits than its factorization.

28456306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73916.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28456306 is about 5334.4452382605. The cubic root of 28456306 is about 305.2995569870.

The spelling of 28456306 in words is "twenty-eight million, four hundred fifty-six thousand, three hundred six".