40805445 has 16 divisors (see below), whose sum is σ = 68725440. Its totient is φ = 20617344.

The previous prime is 40805441. The next prime is 40805459. The reversal of 40805445 is 54450804.

It is not a de Polignac number, because 40805445 - 2² = 40805441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40805441) 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, 71304 + ... + 71873.

It is an arithmetic number, because the mean of its divisors is an integer number (4295340).

Almost surely, 2^40805445 is an apocalyptic number.

It is an amenable number.

40805445 is a deficient number, since it is larger than the sum of its proper divisors (27919995).

40805445 is a wasteful number, since it uses less digits than its factorization.

40805445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143204.

The product of its (nonzero) digits is 12800, while the sum is 30.

The square root of 40805445 is about 6387.9139787571. The cubic root of 40805445 is about 344.2754379769.

The spelling of 40805445 in words is "forty million, eight hundred five thousand, four hundred forty-five".