28999563 has 8 divisors (see below), whose sum is σ = 38754000. Its totient is φ = 19289088.

The previous prime is 28999549. The next prime is 28999577. The reversal of 28999563 is 36599982.

It is an interprime number because it is at equal distance from previous prime (28999549) and next prime (28999577).

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

It is not a de Polignac number, because 28999563 - 2⁶ = 28999499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28999513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9418 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (4844250).

Almost surely, 2^28999563 is an apocalyptic number.

28999563 is a deficient number, since it is larger than the sum of its proper divisors (9754437).

28999563 is a wasteful number, since it uses less digits than its factorization.

28999563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21981.

The product of its digits is 1049760, while the sum is 51.

The square root of 28999563 is about 5385.1242325503. The cubic root of 28999563 is about 307.2301393396.

The spelling of 28999563 in words is "twenty-eight million, nine hundred ninety-nine thousand, five hundred sixty-three".