40406445 has 80 divisors (see below), whose sum is σ = 78408000. Its totient is φ = 19844352.

The previous prime is 40406441. The next prime is 40406459. The reversal of 40406445 is 54460404.

40406445 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 40406445 - 2² = 40406441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406441) 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 79 ways as a sum of consecutive naturals, for example, 453961 + ... + 454049.

It is an arithmetic number, because the mean of its divisors is an integer number (980100).

Almost surely, 2^40406445 is an apocalyptic number.

40406445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40406445 is a deficient number, since it is larger than the sum of its proper divisors (38001555).

40406445 is a wasteful number, since it uses less digits than its factorization.

40406445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 40406445 is about 6356.6064059371. The cubic root of 40406445 is about 343.1496399039.

Adding to 40406445 its reverse (54460404), we get a palindrome (94866849).

The spelling of 40406445 in words is "forty million, four hundred six thousand, four hundred forty-five".