28860663 has 16 divisors (see below), whose sum is σ = 41552000. Its totient is φ = 17712864.

The previous prime is 28860661. The next prime is 28860683. The reversal of 28860663 is 36606882.

It is not a de Polignac number, because 28860663 - 2¹ = 28860661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860661) 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, 18720 + ... + 20202.

It is an arithmetic number, because the mean of its divisors is an integer number (2597000).

Almost surely, 2^28860663 is an apocalyptic number.

28860663 is a deficient number, since it is larger than the sum of its proper divisors (12691337).

28860663 is a wasteful number, since it uses less digits than its factorization.

28860663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28860663 is about 5372.2121142040. The cubic root of 28860663 is about 306.7388379025.

The spelling of 28860663 in words is "twenty-eight million, eight hundred sixty thousand, six hundred sixty-three".