28041251 has 4 divisors (see below), whose sum is σ = 32047152. Its totient is φ = 24035352.

The previous prime is 28041217. The next prime is 28041257. The reversal of 28041251 is 15214082.

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 28041251 - 2¹⁰ = 28040227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28041257) 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, 2002940 + ... + 2002953.

It is an arithmetic number, because the mean of its divisors is an integer number (8011788).

Almost surely, 2^28041251 is an apocalyptic number.

28041251 is a deficient number, since it is larger than the sum of its proper divisors (4005901).

28041251 is an equidigital number, since it uses as much as digits as its factorization.

28041251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005900.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28041251 is about 5295.3990406767. The cubic root of 28041251 is about 303.8079458396.

The spelling of 28041251 in words is "twenty-eight million, forty-one thousand, two hundred fifty-one".