28671265 has 16 divisors (see below), whose sum is σ = 41634432. Its totient is φ = 18503424.

The previous prime is 28671257. The next prime is 28671277. The reversal of 28671265 is 56217682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28671265 - 2³ = 28671257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23499 + ... + 24688.

It is an arithmetic number, because the mean of its divisors is an integer number (2602152).

Almost surely, 2^28671265 is an apocalyptic number.

It is an amenable number.

28671265 is a deficient number, since it is larger than the sum of its proper divisors (12963167).

28671265 is a wasteful number, since it uses less digits than its factorization.

28671265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48216.

The product of its digits is 40320, while the sum is 37.

The square root of 28671265 is about 5354.5555371104. Note that the first 4 decimals coincide. The cubic root of 28671265 is about 306.0663738856.

The spelling of 28671265 in words is "twenty-eight million, six hundred seventy-one thousand, two hundred sixty-five".