40680145 has 16 divisors (see below), whose sum is σ = 54390528. Its totient is φ = 28954240.

The previous prime is 40680139. The next prime is 40680149. The reversal of 40680145 is 54108604.

It is not a de Polignac number, because 40680145 - 2³ = 40680137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40680149) 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, 5284 + ... + 10453.

It is an arithmetic number, because the mean of its divisors is an integer number (3399408).

Almost surely, 2^40680145 is an apocalyptic number.

It is an amenable number.

40680145 is a deficient number, since it is larger than the sum of its proper divisors (13710383).

40680145 is a wasteful number, since it uses less digits than its factorization.

40680145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15800.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40680145 is about 6378.0988546745. The cubic root of 40680145 is about 343.9226914114.

Adding to 40680145 its reverse (54108604), we get a palindrome (94788749).

The spelling of 40680145 in words is "forty million, six hundred eighty thousand, one hundred forty-five".