28298851 has 4 divisors (see below), whose sum is σ = 32341552. Its totient is φ = 24256152.

The previous prime is 28298843. The next prime is 28298861. The reversal of 28298851 is 15889282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28298851 - 2³ = 28298843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28298798 and 28298807.

It is not an unprimeable number, because it can be changed into a prime (28298801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021340 + ... + 2021353.

It is an arithmetic number, because the mean of its divisors is an integer number (8085388).

Almost surely, 2^28298851 is an apocalyptic number.

28298851 is a deficient number, since it is larger than the sum of its proper divisors (4042701).

28298851 is an equidigital number, since it uses as much as digits as its factorization.

28298851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042700.

The product of its digits is 92160, while the sum is 43.

The square root of 28298851 is about 5319.6664369112. Note that the first 3 decimals coincide. The cubic root of 28298851 is about 304.7354186707.

The spelling of 28298851 in words is "twenty-eight million, two hundred ninety-eight thousand, eight hundred fifty-one".