40444040 has 128 divisors (see below), whose sum is σ = 115153920. Its totient is φ = 12441600.

The previous prime is 40444031. The next prime is 40444091. The reversal of 40444040 is 4044404.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149105 + ... + 149375.

It is an arithmetic number, because the mean of its divisors is an integer number (899640).

Almost surely, 2^40444040 is an apocalyptic number.

40444040 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 40444040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57576960).

40444040 is an abundant number, since it is smaller than the sum of its proper divisors (74709880).

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

40444040 is a wasteful number, since it uses less digits than its factorization.

40444040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 339 counting only the distinct ones).

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

The square root of 40444040 is about 6359.5628780601. The cubic root of 40444040 is about 343.2560314441.

40444040 divided by its sum of digits (20) gives a palindrome (2022202).

Adding to 40444040 its reverse (4044404), we get a palindrome (44488444).

It can be divided in two parts, 404 and 44040, that added together give a palindrome (44444).

The spelling of 40444040 in words is "forty million, four hundred forty-four thousand, forty".