40680045 has 72 divisors (see below), whose sum is σ = 86430240. Its totient is φ = 17599680.

The previous prime is 40680037. The next prime is 40680047. The reversal of 40680045 is 54008604.

It is not a de Polignac number, because 40680045 - 2³ = 40680037 is a prime.

It is a super-2 number, since 2×40680045² = 3309732122404050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40680047) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41410 + ... + 42380.

It is an arithmetic number, because the mean of its divisors is an integer number (1200420).

Almost surely, 2^40680045 is an apocalyptic number.

40680045 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40680045 is an abundant number, since it is smaller than the sum of its proper divisors (45750195).

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

40680045 is a wasteful number, since it uses less digits than its factorization.

40680045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1005 counting only the distinct ones).

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

The square root of 40680045 is about 6378.0910153431. The cubic root of 40680045 is about 343.9224096008.

Adding to 40680045 its reverse (54008604), we get a palindrome (94688649).

The spelling of 40680045 in words is "forty million, six hundred eighty thousand, forty-five".