40221040 has 40 divisors (see below), whose sum is σ = 94212720. Its totient is φ = 15968256.

The previous prime is 40221023. The next prime is 40221047. The reversal of 40221040 is 4012204.

40221040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 40221040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221047) 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, 9312 + ... + 12928.

It is an arithmetic number, because the mean of its divisors is an integer number (2355318).

Almost surely, 2^40221040 is an apocalyptic number.

40221040 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 40221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47106360).

40221040 is an abundant number, since it is smaller than the sum of its proper divisors (53991680).

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

40221040 is a wasteful number, since it uses less digits than its factorization.

40221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769 (or 3763 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40221040 is about 6342.0059917979. The cubic root of 40221040 is about 342.6239876460.

Adding to 40221040 its reverse (4012204), we get a palindrome (44233244).

The spelling of 40221040 in words is "forty million, two hundred twenty-one thousand, forty".