28025279 has 4 divisors (see below), whose sum is σ = 28065960. Its totient is φ = 27984600.

The previous prime is 28025273. The next prime is 28025297. The reversal of 28025279 is 97252082.

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 28025279 - 2¹² = 28021183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025273) 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, 19289 + ... + 20690.

It is an arithmetic number, because the mean of its divisors is an integer number (7016490).

Almost surely, 2^28025279 is an apocalyptic number.

28025279 is a deficient number, since it is larger than the sum of its proper divisors (40681).

28025279 is an equidigital number, since it uses as much as digits as its factorization.

28025279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40680.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28025279 is about 5293.8907242216. The cubic root of 28025279 is about 303.7502529536.

The spelling of 28025279 in words is "twenty-eight million, twenty-five thousand, two hundred seventy-nine".