40135540 has 24 divisors (see below), whose sum is σ = 84672000. Its totient is φ = 15980448.

The previous prime is 40135523. The next prime is 40135547. The reversal of 40135540 is 4553104.

40135540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40135540² = 3221723142183200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40135547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 8959.

It is an arithmetic number, because the mean of its divisors is an integer number (3528000).

Almost surely, 2^40135540 is an apocalyptic number.

It is an amenable number.

40135540 is an abundant number, since it is smaller than the sum of its proper divisors (44536460).

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

40135540 is a wasteful number, since it uses less digits than its factorization.

40135540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231 (or 9229 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40135540 is about 6335.2616362704. The cubic root of 40135540 is about 342.3810374139.

Adding to 40135540 its reverse (4553104), we get a palindrome (44688644).

The spelling of 40135540 in words is "forty million, one hundred thirty-five thousand, five hundred forty".