28765071 has 32 divisors (see below), whose sum is σ = 46699200. Its totient is φ = 17418240.

The previous prime is 28765057. The next prime is 28765073. The reversal of 28765071 is 17056782.

It is not a de Polignac number, because 28765071 - 2⁶ = 28765007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28765073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12231 + ... + 14391.

It is an arithmetic number, because the mean of its divisors is an integer number (1459350).

Almost surely, 2^28765071 is an apocalyptic number.

28765071 is a deficient number, since it is larger than the sum of its proper divisors (17934129).

28765071 is a wasteful number, since it uses less digits than its factorization.

28765071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2210 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 28765071 is about 5363.3078412487. The cubic root of 28765071 is about 306.3998042058.

The spelling of 28765071 in words is "twenty-eight million, seven hundred sixty-five thousand, seventy-one".