28225971 has 12 divisors (see below), whose sum is σ = 40870648. Its totient is φ = 18771264.

The previous prime is 28225969. The next prime is 28225987. The reversal of 28225971 is 17952282.

It is not a de Polignac number, because 28225971 - 2¹ = 28225969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28225921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276 + ... + 7518.

Almost surely, 2^28225971 is an apocalyptic number.

28225971 is a deficient number, since it is larger than the sum of its proper divisors (12644677).

28225971 is a wasteful number, since it uses less digits than its factorization.

28225971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682 (or 7679 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28225971 is about 5312.8119673107. The cubic root of 28225971 is about 304.4735916658.

The spelling of 28225971 in words is "twenty-eight million, two hundred twenty-five thousand, nine hundred seventy-one".