40400220440 has 32 divisors (see below), whose sum is σ = 91564015680. Its totient is φ = 16042129152.

The previous prime is 40400220439. The next prime is 40400220449. The reversal of 40400220440 is 4402200404.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400220449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3680672 + ... + 3691631.

It is an arithmetic number, because the mean of its divisors is an integer number (2861375490).

Almost surely, 2^40400220440 is an apocalyptic number.

40400220440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40400220440 is an abundant number, since it is smaller than the sum of its proper divisors (51163795240).

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

40400220440 is a wasteful number, since it uses less digits than its factorization.

40400220440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7372451 (or 7372447 counting only the distinct ones).

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

Adding to 40400220440 its reverse (4402200404), we get a palindrome (44802420844).

The spelling of 40400220440 in words is "forty billion, four hundred million, two hundred twenty thousand, four hundred forty".