40120844040 has 48 divisors (see below), whose sum is σ = 130392744300. Its totient is φ = 10698891648.

The previous prime is 40120844009. The next prime is 40120844041. The reversal of 40120844040 is 4044802104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40109675076 + 11168964 = 200274^2 + 3342^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40120843995 and 40120844013.

It is not an unprimeable number, because it can be changed into a prime (40120844041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55723035 + ... + 55723754.

Almost surely, 2^40120844040 is an apocalyptic number.

40120844040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40120844040 is an abundant number, since it is smaller than the sum of its proper divisors (90271900260).

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

40120844040 is a wasteful number, since it uses less digits than its factorization.

40120844040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111446806 (or 111446799 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The spelling of 40120844040 in words is "forty billion, one hundred twenty million, eight hundred forty-four thousand, forty".