28382865 has 64 divisors (see below), whose sum is σ = 56125440. Its totient is φ = 11957760.

The previous prime is 28382857. The next prime is 28382867. The reversal of 28382865 is 56828382.

28382865 = 185² + 186² + ... + 450².

It is not a de Polignac number, because 28382865 - 2³ = 28382857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28382867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81622 + ... + 81968.

It is an arithmetic number, because the mean of its divisors is an integer number (876960).

Almost surely, 2^28382865 is an apocalyptic number.

It is an amenable number.

28382865 is a deficient number, since it is larger than the sum of its proper divisors (27742575).

28382865 is a wasteful number, since it uses less digits than its factorization.

28382865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its digits is 184320, while the sum is 42.

The square root of 28382865 is about 5327.5571324952. The cubic root of 28382865 is about 305.0366882320.

The spelling of 28382865 in words is "twenty-eight million, three hundred eighty-two thousand, eight hundred sixty-five".