40400808080 has 80 divisors (see below), whose sum is σ = 99050952000. Its totient is φ = 15282639360.

The previous prime is 40400808059. The next prime is 40400808103. The reversal of 40400808080 is 8080800404.

It is a tau number, because it is divible by the number of its divisors (80).

40400808080 is a modest number, since divided by 808080 gives 40400 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844646 + ... + 891194.

It is an arithmetic number, because the mean of its divisors is an integer number (1238136900).

Almost surely, 2^40400808080 is an apocalyptic number.

40400808080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40400808080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49525476000).

40400808080 is an abundant number, since it is smaller than the sum of its proper divisors (58650143920).

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

40400808080 is a wasteful number, since it uses less digits than its factorization.

40400808080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47152 (or 47146 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The spelling of 40400808080 in words is "forty billion, four hundred million, eight hundred eight thousand, eighty".