40228065 has 36 divisors (see below), whose sum is σ = 71773884. Its totient is φ = 20843136.

The previous prime is 40228051. The next prime is 40228109. The reversal of 40228065 is 56082204.

40228065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2331729 + 37896336 = 1527^2 + 6156^2 .

It is not a de Polignac number, because 40228065 - 2¹⁰ = 40227041 is a prime.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 61279 + ... + 61931.

It is an arithmetic number, because the mean of its divisors is an integer number (1993719).

Almost surely, 2^40228065 is an apocalyptic number.

40228065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40228065 is a deficient number, since it is larger than the sum of its proper divisors (31545819).

40228065 is a wasteful number, since it uses less digits than its factorization.

40228065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40228065 is about 6342.5598144598. The cubic root of 40228065 is about 342.6439340339.

The spelling of 40228065 in words is "forty million, two hundred twenty-eight thousand, sixty-five".