28253851 has 4 divisors (see below), whose sum is σ = 28571400. Its totient is φ = 27936304.

The previous prime is 28253831. The next prime is 28253857. The reversal of 28253851 is 15835282.

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 28253851 - 2²¹ = 26156699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28253857) 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, 158641 + ... + 158818.

It is an arithmetic number, because the mean of its divisors is an integer number (7142850).

Almost surely, 2^28253851 is an apocalyptic number.

28253851 is a deficient number, since it is larger than the sum of its proper divisors (317549).

28253851 is an equidigital number, since it uses as much as digits as its factorization.

28253851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317548.

The product of its digits is 19200, while the sum is 34.

The square root of 28253851 is about 5315.4351656285. The cubic root of 28253851 is about 304.5738058784.

The spelling of 28253851 in words is "twenty-eight million, two hundred fifty-three thousand, eight hundred fifty-one".