3440444781 has 8 divisors (see below), whose sum is σ = 4587543360.
Its totient is φ = 2293488032.
The previous prime is 3440444753. The next prime is 3440444801. The reversal of 3440444781 is 1874440443.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 3440444781 - 213 = 3440436589 is a prime.
It is a super-2 number, since 2×34404447812 = 23673320582220275922, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3440444731) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51880 + ... + 97838.
It is an arithmetic number, because the mean of its divisors is an integer number (573442920).
Almost surely, 23440444781 is an apocalyptic number.
It is an amenable number.
3440444781 is a deficient number, since it is larger than the sum of its proper divisors (1147098579).
3440444781 is a wasteful number, since it uses less digits than its factorization.
3440444781 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 70915.
The product of its (nonzero) digits is 172032, while the sum is 39.
The square root of 3440444781 is about 58655.3047984579.
The cubic root of 3440444781 is about 1509.6335208454.
The spelling of 3440444781 in words is "three billion, four hundred forty million, four hundred forty-four thousand, seven hundred eighty-one".