40404756440 has 32 divisors (see below), whose sum is σ = 93843308160. Its totient is φ = 15640550400.

The previous prime is 40404756433. The next prime is 40404756463. The reversal of 40404756440 is 4465740404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40404756394 and 40404756403.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16291001 + ... + 16293480.

It is an arithmetic number, because the mean of its divisors is an integer number (2932603380).

Almost surely, 2^40404756440 is an apocalyptic number.

40404756440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40404756440 is an abundant number, since it is smaller than the sum of its proper divisors (53438551720).

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

40404756440 is a wasteful number, since it uses less digits than its factorization.

40404756440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32584523 (or 32584519 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 38.

The spelling of 40404756440 in words is "forty billion, four hundred four million, seven hundred fifty-six thousand, four hundred forty".