28456773 has 16 divisors (see below), whose sum is σ = 39747456. Its totient is φ = 18075200.

The previous prime is 28456741. The next prime is 28456777. The reversal of 28456773 is 37765482.

It is a cyclic number.

It is not a de Polignac number, because 28456773 - 2⁵ = 28456741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28456777) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21223 + ... + 22523.

It is an arithmetic number, because the mean of its divisors is an integer number (2484216).

Almost surely, 2^28456773 is an apocalyptic number.

28456773 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28456773 is a deficient number, since it is larger than the sum of its proper divisors (11290683).

28456773 is a wasteful number, since it uses less digits than its factorization.

28456773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644.

The product of its digits is 282240, while the sum is 42.

The square root of 28456773 is about 5334.4890102052. The cubic root of 28456773 is about 305.3012270810.

The spelling of 28456773 in words is "twenty-eight million, four hundred fifty-six thousand, seven hundred seventy-three".