28456311 has 8 divisors (see below), whose sum is σ = 40860400. Its totient is φ = 17511552.

The previous prime is 28456289. The next prime is 28456321. The reversal of 28456311 is 11365482.

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

It is not a de Polignac number, because 28456311 - 2⁶ = 28456247 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 (28456321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364786 + ... + 364863.

It is an arithmetic number, because the mean of its divisors is an integer number (5107550).

Almost surely, 2^28456311 is an apocalyptic number.

28456311 is a deficient number, since it is larger than the sum of its proper divisors (12404089).

28456311 is a wasteful number, since it uses less digits than its factorization.

28456311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729665.

The product of its digits is 5760, while the sum is 30.

The square root of 28456311 is about 5334.4457069128. The cubic root of 28456311 is about 305.2995748682.

The spelling of 28456311 in words is "twenty-eight million, four hundred fifty-six thousand, three hundred eleven".