40540140 has 36 divisors (see below), whose sum is σ = 122972304. Its totient is φ = 10810656.

The previous prime is 40540133. The next prime is 40540141. The reversal of 40540140 is 4104504.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (40540141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112432 + ... + 112791.

Almost surely, 2^40540140 is an apocalyptic number.

It is an amenable number.

40540140 is an abundant number, since it is smaller than the sum of its proper divisors (82432164).

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

40540140 is a wasteful number, since it uses less digits than its factorization.

40540140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225238 (or 225233 counting only the distinct ones).

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

The square root of 40540140 is about 6367.1139458942. The cubic root of 40540140 is about 343.5276892053.

Adding to 40540140 its reverse (4104504), we get a palindrome (44644644).

The spelling of 40540140 in words is "forty million, five hundred forty thousand, one hundred forty".