28089663 has 8 divisors (see below), whose sum is σ = 42803328. Its totient is φ = 16051224.

The previous prime is 28089643. The next prime is 28089667. The reversal of 28089663 is 36698082.

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

It is not a de Polignac number, because 28089663 - 2⁵ = 28089631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089667) 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, 668781 + ... + 668822.

It is an arithmetic number, because the mean of its divisors is an integer number (5350416).

Almost surely, 2^28089663 is an apocalyptic number.

28089663 is a deficient number, since it is larger than the sum of its proper divisors (14713665).

28089663 is a wasteful number, since it uses less digits than its factorization.

28089663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337613.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 28089663 is about 5299.9682074518. The cubic root of 28089663 is about 303.9826823872.

The spelling of 28089663 in words is "twenty-eight million, eighty-nine thousand, six hundred sixty-three".