28500771 has 8 divisors (see below), whose sum is σ = 40924240. Its totient is φ = 17538912.

The previous prime is 28500763. The next prime is 28500827. The reversal of 28500771 is 17700582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28500771 - 2³ = 28500763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28500071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365356 + ... + 365433.

It is an arithmetic number, because the mean of its divisors is an integer number (5115530).

Almost surely, 2^28500771 is an apocalyptic number.

28500771 is a deficient number, since it is larger than the sum of its proper divisors (12423469).

28500771 is a wasteful number, since it uses less digits than its factorization.

28500771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730805.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 28500771 is about 5338.6113362934. The cubic root of 28500771 is about 305.4584916501.

It can be divided in two parts, 2850077 and 1, that added together give a triangular number (2850078 = T₂₃₈₇).

The spelling of 28500771 in words is "twenty-eight million, five hundred thousand, seven hundred seventy-one".