40415040 has 84 divisors (see below), whose sum is σ = 139020804. Its totient is φ = 10776576.

The previous prime is 40415029. The next prime is 40415093. The reversal of 40415040 is 4051404.

It can be written as a sum of positive squares in 2 ways, for example, as 9144576 + 31270464 = 3024^2 + 5592^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4137 + ... + 9896.

Almost surely, 2^40415040 is an apocalyptic number.

40415040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40415040 is an abundant number, since it is smaller than the sum of its proper divisors (98605764).

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

40415040 is a wasteful number, since it uses less digits than its factorization.

40415040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056 (or 14043 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40415040 is about 6357.2824382750. The cubic root of 40415040 is about 343.1739690430.

Adding to 40415040 its reverse (4051404), we get a palindrome (44466444).

The spelling of 40415040 in words is "forty million, four hundred fifteen thousand, forty".