28905063 has 16 divisors (see below), whose sum is σ = 42135552. Its totient is φ = 17480000.

The previous prime is 28905059. The next prime is 28905133. The reversal of 28905063 is 36050982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28905063 - 2² = 28905059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28905053) 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, 24538 + ... + 25688.

It is an arithmetic number, because the mean of its divisors is an integer number (2633472).

Almost surely, 2^28905063 is an apocalyptic number.

28905063 is a deficient number, since it is larger than the sum of its proper divisors (13230489).

28905063 is a wasteful number, since it uses less digits than its factorization.

28905063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 28905063 is about 5376.3429020106. The cubic root of 28905063 is about 306.8960556619.

The spelling of 28905063 in words is "twenty-eight million, nine hundred five thousand, sixty-three".