40140040 has 32 divisors (see below), whose sum is σ = 93231360. Its totient is φ = 15537600.

The previous prime is 40140019. The next prime is 40140047. The reversal of 40140040 is 4004104.

It is a happy number.

It is a super-2 number, since 2×40140040² = 3222445622403200, 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 40140040.

It is not an unprimeable number, because it can be changed into a prime (40140047) 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, 14946 + ... + 17425.

It is an arithmetic number, because the mean of its divisors is an integer number (2913480).

Almost surely, 2^40140040 is an apocalyptic number.

40140040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40140040 is an abundant number, since it is smaller than the sum of its proper divisors (53091320).

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

40140040 is a wasteful number, since it uses less digits than its factorization.

40140040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32413 (or 32409 counting only the distinct ones).

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

The square root of 40140040 is about 6335.6167813402. The cubic root of 40140040 is about 342.3938328656.

Adding to 40140040 its reverse (4004104), we get a palindrome (44144144).

The spelling of 40140040 in words is "forty million, one hundred forty thousand, forty".