28105671 has 16 divisors (see below), whose sum is σ = 41753088. Its totient is φ = 16670400.

The previous prime is 28105667. The next prime is 28105697. The reversal of 28105671 is 17650182.

It is not a de Polignac number, because 28105671 - 2² = 28105667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28105631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7510 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (2609568).

Almost surely, 2^28105671 is an apocalyptic number.

28105671 is a deficient number, since it is larger than the sum of its proper divisors (13647417).

28105671 is a wasteful number, since it uses less digits than its factorization.

28105671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18182.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28105671 is about 5301.4781900900. The cubic root of 28105671 is about 304.0404169197.

The spelling of 28105671 in words is "twenty-eight million, one hundred five thousand, six hundred seventy-one".