28275765 has 32 divisors (see below), whose sum is σ = 52690176. Its totient is φ = 12679680.

The previous prime is 28275761. The next prime is 28275769. The reversal of 28275765 is 56757282.

It is an interprime number because it is at equal distance from previous prime (28275761) and next prime (28275769).

It is not a de Polignac number, because 28275765 - 2² = 28275761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28275761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3025 + ... + 8105.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^28275765 is an apocalyptic number.

It is an amenable number.

28275765 is a deficient number, since it is larger than the sum of its proper divisors (24414411).

28275765 is a wasteful number, since it uses less digits than its factorization.

28275765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149.

The product of its digits is 235200, while the sum is 42.

The square root of 28275765 is about 5317.4961212962. The cubic root of 28275765 is about 304.6525291356.

The spelling of 28275765 in words is "twenty-eight million, two hundred seventy-five thousand, seven hundred sixty-five".