40040844840 has 96 divisors (see below), whose sum is σ = 130157749800. Its totient is φ = 10675507200.

The previous prime is 40040844827. The next prime is 40040844869. The reversal of 40040844840 is 4844804004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30416057604 + 9624787236 = 174402^2 + 98106^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40040844795 and 40040844804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3222640 + ... + 3235040.

Almost surely, 2^40040844840 is an apocalyptic number.

40040844840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040844840 is an abundant number, since it is smaller than the sum of its proper divisors (90116904960).

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

40040844840 is a wasteful number, since it uses less digits than its factorization.

40040844840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21387 (or 21380 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 36.

The spelling of 40040844840 in words is "forty billion, forty million, eight hundred forty-four thousand, eight hundred forty".