28889851 has 8 divisors (see below), whose sum is σ = 31301424. Its totient is φ = 26557440.

The previous prime is 28889827. The next prime is 28889857. The reversal of 28889851 is 15898882.

It is a happy number.

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 28889851 - 2⁹ = 28889339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28889795 and 28889804.

It is not an unprimeable number, because it can be changed into a prime (28889857) 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, 19030 + ... + 20491.

It is an arithmetic number, because the mean of its divisors is an integer number (3912678).

Almost surely, 2^28889851 is an apocalyptic number.

28889851 is a deficient number, since it is larger than the sum of its proper divisors (2411573).

28889851 is a wasteful number, since it uses less digits than its factorization.

28889851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39581.

The product of its digits is 368640, while the sum is 49.

The square root of 28889851 is about 5374.9279995178. The cubic root of 28889851 is about 306.8422090168.

The spelling of 28889851 in words is "twenty-eight million, eight hundred eighty-nine thousand, eight hundred fifty-one".