40805641 has 4 divisors (see below), whose sum is σ = 42121984. Its totient is φ = 39489300.

The previous prime is 40805599. The next prime is 40805647. The reversal of 40805641 is 14650804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40805641 - 2¹¹ = 40803593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40805647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658125 + ... + 658186.

It is an arithmetic number, because the mean of its divisors is an integer number (10530496).

Almost surely, 2^40805641 is an apocalyptic number.

It is an amenable number.

40805641 is a deficient number, since it is larger than the sum of its proper divisors (1316343).

40805641 is a wasteful number, since it uses less digits than its factorization.

40805641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316342.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40805641 is about 6387.9293202101. The cubic root of 40805641 is about 344.2759891932.

The spelling of 40805641 in words is "forty million, eight hundred five thousand, six hundred forty-one".