444643364 has 48 divisors (see below), whose sum is σ = 905567040. Its totient is φ = 188789760.

The previous prime is 444643351. The next prime is 444643369. The reversal of 444643364 is 463346444.

It is a super-2 number, since 2×444643364² = 395415442298472992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (444643369) 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, 100307 + ... + 104645.

It is an arithmetic number, because the mean of its divisors is an integer number (18865980).

Almost surely, 2^444643364 is an apocalyptic number.

444643364 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

444643364 is an abundant number, since it is smaller than the sum of its proper divisors (460923676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

444643364 is a wasteful number, since it uses less digits than its factorization.

444643364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508 (or 4506 counting only the distinct ones).

The product of its digits is 331776, while the sum is 38.

The square root of 444643364 is about 21086.5683315233. The cubic root of 444643364 is about 763.2566644116.

The spelling of 444643364 in words is "four hundred forty-four million, six hundred forty-three thousand, three hundred sixty-four".