444280221 has 40 divisors (see below), whose sum is σ = 827454144. Its totient is φ = 230791680.

The previous prime is 444280219. The next prime is 444280229. The reversal of 444280221 is 122082444.

It is not a de Polignac number, because 444280221 - 2¹ = 444280219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444280229) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29380 + ... + 41853.

Almost surely, 2^444280221 is an apocalyptic number.

It is an amenable number.

444280221 is a deficient number, since it is larger than the sum of its proper divisors (383173923).

444280221 is a wasteful number, since it uses less digits than its factorization.

444280221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71263 (or 71254 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 444280221 is about 21077.9558069562. The cubic root of 444280221 is about 763.0488223315.

The spelling of 444280221 in words is "four hundred forty-four million, two hundred eighty thousand, two hundred twenty-one".