28890851 has 8 divisors (see below), whose sum is σ = 31684608. Its totient is φ = 26125000.

The previous prime is 28890817. The next prime is 28890857. The reversal of 28890851 is 15809882.

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

It is not a de Polignac number, because 28890851 - 2⁶ = 28890787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28890799 and 28890808.

It is not an unprimeable number, because it can be changed into a prime (28890857) 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, 4775 + ... + 8976.

It is an arithmetic number, because the mean of its divisors is an integer number (3960576).

Almost surely, 2^28890851 is an apocalyptic number.

28890851 is a deficient number, since it is larger than the sum of its proper divisors (2793757).

28890851 is a wasteful number, since it uses less digits than its factorization.

28890851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13953.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 28890851 is about 5375.0210232147. The cubic root of 28890851 is about 306.8457493451.

The spelling of 28890851 in words is "twenty-eight million, eight hundred ninety thousand, eight hundred fifty-one".