40400041440 has 144 divisors (see below), whose sum is σ = 139881171024. Its totient is φ = 9793935360.

The previous prime is 40400041439. The next prime is 40400041447. The reversal of 40400041440 is 4414000404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400041447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289717 + ... + 405876.

It is an arithmetic number, because the mean of its divisors is an integer number (971397021).

Almost surely, 2^40400041440 is an apocalyptic number.

40400041440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40400041440 is an abundant number, since it is smaller than the sum of its proper divisors (99481129584).

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

40400041440 is a wasteful number, since it uses less digits than its factorization.

40400041440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695633 (or 695614 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 40400041440 its reverse (4414000404), we get a palindrome (44814041844).

The spelling of 40400041440 in words is "forty billion, four hundred million, forty-one thousand, four hundred forty".