444213220 has 48 divisors (see below), whose sum is σ = 1041340608. Its totient is φ = 157772160.

The previous prime is 444213199. The next prime is 444213221. The reversal of 444213220 is 22312444.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 444213191 and 444213200.

It is not an unprimeable number, because it can be changed into a prime (444213221) 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, 14019 + ... + 32938.

It is an arithmetic number, because the mean of its divisors is an integer number (21694596).

Almost surely, 2^444213220 is an apocalyptic number.

It is an amenable number.

444213220 is an abundant number, since it is smaller than the sum of its proper divisors (597127388).

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

444213220 is a wasteful number, since it uses less digits than its factorization.

444213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47020 (or 47018 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 444213220 is about 21076.3663851244. The cubic root of 444213220 is about 763.0104624542.

Adding to 444213220 its reverse (22312444), we get a palindrome (466525664).

The spelling of 444213220 in words is "four hundred forty-four million, two hundred thirteen thousand, two hundred twenty".