40044004400 has 60 divisors (see below), whose sum is σ = 96434643264. Its totient is φ = 15979488000.

The previous prime is 40044004397. The next prime is 40044004453. The reversal of 40044004400 is 440044004.

It is a Harshad number since it is a multiple of its sum of digits (20).

40044004400 is a modest number, since divided by 44004400 gives 400 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49505 + ... + 287295.

Almost surely, 2^40044004400 is an apocalyptic number.

40044004400 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 40044004400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48217321632).

40044004400 is an abundant number, since it is smaller than the sum of its proper divisors (56390638864).

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

40044004400 is a wasteful number, since it uses less digits than its factorization.

40044004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238230 (or 238219 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40044004400 its reverse (440044004), we get a palindrome (40484048404).

The spelling of 40044004400 in words is "forty billion, forty-four million, four thousand, four hundred".