Search a number
-
+
40512409 = 759233421
BaseRepresentation
bin1001101010001…
…0101110011001
32211020020120121
42122202232121
540332344114
64004153241
71001230660
oct232425631
984206517
1040512409
1120960633
1211698821
138515b52
145547dd7
153853a24
hex26a2b99

40512409 has 16 divisors (see below), whose sum is σ = 47399040. Its totient is φ = 33909120.

The previous prime is 40512397. The next prime is 40512419. The reversal of 40512409 is 90421504.

40512409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40512409 - 29 = 40511897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40512419) 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 15 ways as a sum of consecutive naturals, for example, 96019 + ... + 96439.

It is an arithmetic number, because the mean of its divisors is an integer number (2962440).

Almost surely, 240512409 is an apocalyptic number.

It is an amenable number.

40512409 is a deficient number, since it is larger than the sum of its proper divisors (6886631).

40512409 is a wasteful number, since it uses less digits than its factorization.

40512409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40512409 is about 6364.9358991273. The cubic root of 40512409 is about 343.4493426636.

The spelling of 40512409 in words is "forty million, five hundred twelve thousand, four hundred nine".

Divisors: 1 7 59 233 413 421 1631 2947 13747 24839 96229 98093 173873 686651 5787487 40512409