444021393 has 8 divisors (see below), whose sum is σ = 623188000. Its totient is φ = 280434528.

The previous prime is 444021377. The next prime is 444021467. The reversal of 444021393 is 393120444.

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

It is not a de Polignac number, because 444021393 - 2⁴ = 444021377 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 444021393.

It is not an unprimeable number, because it can be changed into a prime (444021313) 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, 3894868 + ... + 3894981.

It is an arithmetic number, because the mean of its divisors is an integer number (77898500).

Almost surely, 2^444021393 is an apocalyptic number.

It is an amenable number.

444021393 is a deficient number, since it is larger than the sum of its proper divisors (179166607).

444021393 is a wasteful number, since it uses less digits than its factorization.

444021393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7789871.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 444021393 is about 21071.8151330160. The cubic root of 444021393 is about 762.9006149942.

The spelling of 444021393 in words is "four hundred forty-four million, twenty-one thousand, three hundred ninety-three".