28871963 has 8 divisors (see below), whose sum is σ = 31099200. Its totient is φ = 26715528.

The previous prime is 28871957. The next prime is 28871977. The reversal of 28871963 is 36917882.

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 28871963 - 2²⁰ = 27823387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28871993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16853 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (3887400).

Almost surely, 2^28871963 is an apocalyptic number.

28871963 is a deficient number, since it is larger than the sum of its proper divisors (2227237).

28871963 is a wasteful number, since it uses less digits than its factorization.

28871963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35401.

The product of its digits is 145152, while the sum is 44.

The square root of 28871963 is about 5373.2637195656. The cubic root of 28871963 is about 306.7788658186.

The spelling of 28871963 in words is "twenty-eight million, eight hundred seventy-one thousand, nine hundred sixty-three".