381444220439 has 16 divisors (see below), whose sum is σ = 394206108480. Its totient is φ = 368890878720.

The previous prime is 381444220433. The next prime is 381444220447. The reversal of 381444220439 is 934022444183.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 381444220439 - 2²⁴ = 381427443223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381444220439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381444220433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21579497 + ... + 21597165.

It is an arithmetic number, because the mean of its divisors is an integer number (24637881780).

Almost surely, 2^381444220439 is an apocalyptic number.

381444220439 is a deficient number, since it is larger than the sum of its proper divisors (12761888041).

381444220439 is a wasteful number, since it uses less digits than its factorization.

381444220439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23530.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 381444220439 in words is "three hundred eighty-one billion, four hundred forty-four million, two hundred twenty thousand, four hundred thirty-nine".