4021440240990 has 32 divisors (see below), whose sum is σ = 9661022019360. Its totient is φ = 1071321237504.

The previous prime is 4021440240929. The next prime is 4021440240991. The reversal of 4021440240990 is 990420441204.

It is a super-2 number, since 2×4021440240990² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021440240991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66395899 + ... + 66456438.

It is an arithmetic number, because the mean of its divisors is an integer number (301906938105).

Almost surely, 2^{4021440240990} is an apocalyptic number.

4021440240990 is an abundant number, since it is smaller than the sum of its proper divisors (5639581778370).

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

4021440240990 is a wasteful number, since it uses less digits than its factorization.

4021440240990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132853356.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 4021440240990 in words is "four trillion, twenty-one billion, four hundred forty million, two hundred forty thousand, nine hundred ninety".