40004440400 has 60 divisors (see below), whose sum is σ = 97545220992. Its totient is φ = 15762933120.

The previous prime is 40004440391. The next prime is 40004440447. The reversal of 40004440400 is 404440004.

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

It is a congruent number.

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, 719552 + ... + 773151.

Almost surely, 2^40004440400 is an apocalyptic number.

40004440400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40004440400 is an abundant number, since it is smaller than the sum of its proper divisors (57540780592).

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

40004440400 is a wasteful number, since it uses less digits than its factorization.

40004440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492788 (or 1492777 counting only the distinct ones).

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

Adding to 40004440400 its reverse (404440004), we get a palindrome (40408880404).

The spelling of 40004440400 in words is "forty billion, four million, four hundred forty thousand, four hundred".