4445438019 has 8 divisors (see below), whose sum is σ = 6466091712. Its totient is φ = 2694204840.

The previous prime is 4445437991. The next prime is 4445438021. The reversal of 4445438019 is 9108345444.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4445438019 - 2²³ = 4437049411 is a prime.

It is a super-2 number, since 2×4445438019² = 39523838361541288722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4445438029) 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, 67355089 + ... + 67355154.

It is an arithmetic number, because the mean of its divisors is an integer number (808261464).

Almost surely, 2^4445438019 is an apocalyptic number.

4445438019 is a deficient number, since it is larger than the sum of its proper divisors (2020653693).

4445438019 is a wasteful number, since it uses less digits than its factorization.

4445438019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134710257.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 4445438019 is about 66674.1180594089. The cubic root of 4445438019 is about 1644.2638920366.

The spelling of 4445438019 in words is "four billion, four hundred forty-five million, four hundred thirty-eight thousand, nineteen".