28436065 has 32 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 18144000.

The previous prime is 28436059. The next prime is 28436069. The reversal of 28436065 is 56063482.

28436065 = 421² + 422² + ... + 542².

It is a happy number.

It is not a de Polignac number, because 28436065 - 2⁷ = 28435937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28436065.

It is not an unprimeable number, because it can be changed into a prime (28436069) 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 31 ways as a sum of consecutive naturals, for example, 40215 + ... + 40915.

It is an arithmetic number, because the mean of its divisors is an integer number (1305720).

Almost surely, 2^28436065 is an apocalyptic number.

It is an amenable number.

28436065 is a deficient number, since it is larger than the sum of its proper divisors (13346975).

28436065 is a wasteful number, since it uses less digits than its factorization.

28436065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28436065 is about 5332.5477025527. The cubic root of 28436065 is about 305.2271531867.

The spelling of 28436065 in words is "twenty-eight million, four hundred thirty-six thousand, sixty-five".