28202051 has 4 divisors (see below), whose sum is σ = 28240752. Its totient is φ = 28163352.

The previous prime is 28202039. The next prime is 28202089. The reversal of 28202051 is 15020282.

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 28202051 - 2¹⁴ = 28185667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28202011) 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, 18236 + ... + 19721.

It is an arithmetic number, because the mean of its divisors is an integer number (7060188).

Almost surely, 2^28202051 is an apocalyptic number.

28202051 is a deficient number, since it is larger than the sum of its proper divisors (38701).

28202051 is an equidigital number, since it uses as much as digits as its factorization.

28202051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38700.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 28202051 is about 5310.5603282516. The cubic root of 28202051 is about 304.3875589998.

The spelling of 28202051 in words is "twenty-eight million, two hundred two thousand, fifty-one".