40206445 has 32 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 28968960.

The previous prime is 40206431. The next prime is 40206449. The reversal of 40206445 is 54460204.

It is not a de Polignac number, because 40206445 - 2²¹ = 38109293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40206449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289186 + ... + 289324.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^40206445 is an apocalyptic number.

It is an amenable number.

40206445 is a deficient number, since it is larger than the sum of its proper divisors (13136915).

40206445 is a wasteful number, since it uses less digits than its factorization.

40206445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40206445 is about 6340.8552262293. The cubic root of 40206445 is about 342.5825400017.

Adding to 40206445 its reverse (54460204), we get a palindrome (94666649).

The spelling of 40206445 in words is "forty million, two hundred six thousand, four hundred forty-five".