28943005 has 16 divisors (see below), whose sum is σ = 42747264. Its totient is φ = 18319680.

The previous prime is 28943003. The next prime is 28943011. The reversal of 28943005 is 50034982.

It is not a de Polignac number, because 28943005 - 2¹ = 28943003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31351 + ... + 32260.

It is an arithmetic number, because the mean of its divisors is an integer number (2671704).

Almost surely, 2^28943005 is an apocalyptic number.

It is an amenable number.

28943005 is a deficient number, since it is larger than the sum of its proper divisors (13804259).

28943005 is a wasteful number, since it uses less digits than its factorization.

28943005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63636.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28943005 is about 5379.8703515977. The cubic root of 28943005 is about 307.0302785020.

Adding to 28943005 its reverse (50034982), we get a palindrome (78977987).

The spelling of 28943005 in words is "twenty-eight million, nine hundred forty-three thousand, five".