4021444432440 has 48 divisors (see below), whose sum is σ = 13069694406600. Its totient is φ = 1072385181888.

The previous prime is 4021444432429. The next prime is 4021444432463. The reversal of 4021444432440 is 442344441204.

It is a happy number.

4021444432440 is a `hidden beast` number, since 4 + 0 + 2 + 144 + 44 + 32 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4021444432395 and 4021444432404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5585339130 + ... + 5585339849.

Almost surely, 2^{4021444432440} is an apocalyptic number.

4021444432440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4021444432440 is an abundant number, since it is smaller than the sum of its proper divisors (9048249974160).

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

4021444432440 is a wasteful number, since it uses less digits than its factorization.

4021444432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11170678996 (or 11170678989 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 36.

Adding to 4021444432440 its reverse (442344441204), we get a palindrome (4463788873644).

The spelling of 4021444432440 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred thirty-two thousand, four hundred forty".