28030771 has 4 divisors (see below), whose sum is σ = 28045512. Its totient is φ = 28016032.

The previous prime is 28030763. The next prime is 28030801. The reversal of 28030771 is 17703082.

It is a happy number.

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 28030771 - 2³ = 28030763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28030271) 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, 4006 + ... + 8491.

It is an arithmetic number, because the mean of its divisors is an integer number (7011378).

Almost surely, 2^28030771 is an apocalyptic number.

28030771 is a deficient number, since it is larger than the sum of its proper divisors (14741).

28030771 is a wasteful number, since it uses less digits than its factorization.

28030771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14740.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 28030771 is about 5294.4094099342. The cubic root of 28030771 is about 303.7700932250.

The spelling of 28030771 in words is "twenty-eight million, thirty thousand, seven hundred seventy-one".