444519993 has 8 divisors (see below), whose sum is σ = 602409856. Its totient is φ = 291488400.

The previous prime is 444519989. The next prime is 444520001. The reversal of 444519993 is 399915444.

It is a happy number.

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

It is not a de Polignac number, because 444519993 - 2² = 444519989 is a prime.

It is a super-3 number, since 3×444519993³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444519913) 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, 1214353 + ... + 1214718.

It is an arithmetic number, because the mean of its divisors is an integer number (75301232).

Almost surely, 2^444519993 is an apocalyptic number.

It is an amenable number.

444519993 is a deficient number, since it is larger than the sum of its proper divisors (157889863).

444519993 is a wasteful number, since it uses less digits than its factorization.

444519993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429135.

The product of its digits is 699840, while the sum is 48.

The square root of 444519993 is about 21083.6427829728. The cubic root of 444519993 is about 763.1860666728.

The spelling of 444519993 in words is "four hundred forty-four million, five hundred nineteen thousand, nine hundred ninety-three".