40080645 has 72 divisors (see below), whose sum is σ = 81041688. Its totient is φ = 18247680.

The previous prime is 40080643. The next prime is 40080653. The reversal of 40080645 is 54608004.

It can be written as a sum of positive squares in 4 ways, for example, as 2405601 + 37675044 = 1551^2 + 6138^2 .

It is not a de Polignac number, because 40080645 - 2¹ = 40080643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40080641) 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 71 ways as a sum of consecutive naturals, for example, 92349 + ... + 92781.

It is an arithmetic number, because the mean of its divisors is an integer number (1125579).

Almost surely, 2^40080645 is an apocalyptic number.

40080645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40080645 is an abundant number, since it is smaller than the sum of its proper divisors (40961043).

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

40080645 is a wasteful number, since it uses less digits than its factorization.

40080645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40080645 is about 6330.9276571447. The cubic root of 40080645 is about 342.2248700664.

Adding to 40080645 its reverse (54608004), we get a palindrome (94688649).

The spelling of 40080645 in words is "forty million, eighty thousand, six hundred forty-five".