28266971 has 12 divisors (see below), whose sum is σ = 30414456. Its totient is φ = 26179200.

The previous prime is 28266961. The next prime is 28266991. The reversal of 28266971 is 17966282.

It is not a de Polignac number, because 28266971 - 2²² = 24072667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28266961) 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, 173336 + ... + 173498.

It is an arithmetic number, because the mean of its divisors is an integer number (2534538).

Almost surely, 2^28266971 is an apocalyptic number.

28266971 is a deficient number, since it is larger than the sum of its proper divisors (2147485).

28266971 is a wasteful number, since it uses less digits than its factorization.

28266971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 281 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 28266971 is about 5316.6691640537. The cubic root of 28266971 is about 304.6209426971.

The spelling of 28266971 in words is "twenty-eight million, two hundred sixty-six thousand, nine hundred seventy-one".