28277671 has 4 divisors (see below), whose sum is σ = 28290600. Its totient is φ = 28264744.

The previous prime is 28277663. The next prime is 28277687. The reversal of 28277671 is 17677282.

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 28277671 - 2³ = 28277663 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28277371) 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, 2281 + ... + 7858.

It is an arithmetic number, because the mean of its divisors is an integer number (7072650).

Almost surely, 2^28277671 is an apocalyptic number.

28277671 is a deficient number, since it is larger than the sum of its proper divisors (12929).

28277671 is a wasteful number, since it uses less digits than its factorization.

28277671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12928.

The product of its digits is 65856, while the sum is 40.

The square root of 28277671 is about 5317.6753379649. The cubic root of 28277671 is about 304.6593742751.

The spelling of 28277671 in words is "twenty-eight million, two hundred seventy-seven thousand, six hundred seventy-one".