40400800000 has 216 divisors, whose sum is σ = 109985710464. Its totient is φ = 14688000000.

The previous prime is 40400799977. The next prime is 40400800001. The reversal of 40400800000 is 800404.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40400800001) 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 23 ways as a sum of consecutive naturals, for example, 8797705 + ... + 8802295.

It is an arithmetic number, because the mean of its divisors is an integer number (509193104).

Almost surely, 2^40400800000 is an apocalyptic number.

40400800000 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 40400800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54992855232).

40400800000 is an abundant number, since it is smaller than the sum of its proper divisors (69584910464).

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

40400800000 is an frugal number, since it uses more digits than its factorization.

40400800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643 (or 4609 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The spelling of 40400800000 in words is "forty billion, four hundred million, eight hundred thousand".