40415540 has 24 divisors (see below), whose sum is σ = 92588832. Its totient is φ = 14696480.

The previous prime is 40415519. The next prime is 40415549. The reversal of 40415540 is 4551404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40415549) 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 7 ways as a sum of consecutive naturals, for example, 91634 + ... + 92073.

It is an arithmetic number, because the mean of its divisors is an integer number (3857868).

Almost surely, 2^40415540 is an apocalyptic number.

It is an amenable number.

40415540 is an abundant number, since it is smaller than the sum of its proper divisors (52173292).

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

40415540 is a wasteful number, since it uses less digits than its factorization.

40415540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183727 (or 183725 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 40415540 is about 6357.3217631326. The cubic root of 40415540 is about 343.1753842445.

Adding to 40415540 its reverse (4551404), we get a palindrome (44966944).

The spelling of 40415540 in words is "forty million, four hundred fifteen thousand, five hundred forty".