28770271 has 4 divisors (see below), whose sum is σ = 28785112. Its totient is φ = 28755432.

The previous prime is 28770257. The next prime is 28770277. The reversal of 28770271 is 17207782.

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 28770271 - 2⁷ = 28770143 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 (28770277) 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, 3981 + ... + 8566.

It is an arithmetic number, because the mean of its divisors is an integer number (7196278).

Almost surely, 2^28770271 is an apocalyptic number.

28770271 is a deficient number, since it is larger than the sum of its proper divisors (14841).

28770271 is a wasteful number, since it uses less digits than its factorization.

28770271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 28770271 is about 5363.7925947971. The cubic root of 28770271 is about 306.4182662146.

The spelling of 28770271 in words is "twenty-eight million, seven hundred seventy thousand, two hundred seventy-one".