28901563 has 8 divisors (see below), whose sum is σ = 29491200. Its totient is φ = 28315368.

The previous prime is 28901549. The next prime is 28901573. The reversal of 28901563 is 36510982.

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

It is a cyclic number.

It is not a de Polignac number, because 28901563 - 2⁵ = 28901531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28901573) 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, 21958 + ... + 23236.

It is an arithmetic number, because the mean of its divisors is an integer number (3686400).

Almost surely, 2^28901563 is an apocalyptic number.

28901563 is a deficient number, since it is larger than the sum of its proper divisors (589637).

28901563 is a wasteful number, since it uses less digits than its factorization.

28901563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 28901563 is about 5376.0173920850. The cubic root of 28901563 is about 306.8836682179.

The spelling of 28901563 in words is "twenty-eight million, nine hundred one thousand, five hundred sixty-three".