40040140 has 24 divisors (see below), whose sum is σ = 96096672. Its totient is φ = 13728000.

The previous prime is 40040131. The next prime is 40040141. The reversal of 40040140 is 4104004.

It is a happy number.

It is a super-2 number, since 2×40040140² = 3206425622439200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40040140.

It is not an unprimeable number, because it can be changed into a prime (40040141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142861 + ... + 143140.

It is an arithmetic number, because the mean of its divisors is an integer number (4004028).

Almost surely, 2^40040140 is an apocalyptic number.

It is an amenable number.

40040140 is an abundant number, since it is smaller than the sum of its proper divisors (56056532).

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

40040140 is a wasteful number, since it uses less digits than its factorization.

40040140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286017 (or 286015 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40040140 is about 6327.7278702549. The cubic root of 40040140 is about 342.1095484816.

Adding to 40040140 its reverse (4104004), we get a palindrome (44144144).

The spelling of 40040140 in words is "forty million, forty thousand, one hundred forty".