40565838 has 32 divisors (see below), whose sum is σ = 86211360. Its totient is φ = 12700800.

The previous prime is 40565831. The next prime is 40565849. The reversal of 40565838 is 83856504.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40565796 and 40565805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40565831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3288 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (2694105).

Almost surely, 2^40565838 is an apocalyptic number.

40565838 is an abundant number, since it is smaller than the sum of its proper divisors (45645522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40565838 is a wasteful number, since it uses less digits than its factorization.

40565838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 40565838 is about 6369.1316519601. The cubic root of 40565838 is about 343.6002601592.

The spelling of 40565838 in words is "forty million, five hundred sixty-five thousand, eight hundred thirty-eight".